Journal articles:

McElveen, K. (2004). Children and Nature: Psychological, Sociocultural and Evolutionary Investigations. Edited by Peter H. Kahn, Jr. and Stephen R. Kellert. Cambridge: The MIT Press.

Pitman, C. (1970). The Spotted Sphinx, by Joy Adamson. New York: Collins.

Sacchi, S, et al. (2014). Moral reasoning and climate change mitigation: The deontological reaction toward the market-based approach. Amsterdam: Elsevier.

Books:

Shepherd, D. (2005). An Artist in Conservation. Cranleigh: R.D. & A.S. Shepherd Partnership.

Shepherd, D., & Howley, B. (2004). Painting with David Shepherd. New York: Collins.

Shepherd, D. (1975). The Man who Loves Giants: An Artist Among Elephants and Engines: David Shepherd’s Autobiography. Newton Abbot: David and Charles.

Newspapers:

https://www.nytimes.com/2017/09/25/arts/david-shepherd-who-both-painted-and-preserved-wildlife-dies-at-86.html

https://www.thetimes.co.uk/article/david-shepherd-obituary-ghldd60k8

https://www.independent.co.uk/news/obituaries/david-shepherd-painter-and-conservationist-who-celebrated-africa-s-wildlife-a7965841.html

Websites:

https://www.davidshepherd.com/davidshepherd-paintings.html

http://mandyshepherd.com/index2.htm

https://davidshepherd.org

https://www.rafbf.org

https://alchetron.com/David-Shepherd-(artist)

Pictures:

https://nivagcollectables.co.uk/p/3937/other-wedgwood/david-shepherd-collection-of-8-wildlife-plates-1

https://davidshepherd.org/product/the-ivory-is-theirs/

https://davidshepherd.org/product/study-for-tiger-fire/

https://www.shippingtandy.com/features/union-castle-line-part-two/c

https://www.theguardian.com/artanddesign/2017/sep/21/david-shepherd-obituary?page=with%3Aimg-2

https://www.getsurrey.co.uk/news/surrey-news/world-famous-wildlife-artist-conservationist-13649210

https://www.amazon.com/artist-Africa-David-Shepherd/dp/0002110326

https://www.abebooks.co.uk/book-search/title/man-who-loves-giants/author/shepherd-david/

https://www.goodreads.com/book/show/3627481-a-brush-with-steam

https://www.amazon.co.uk/David-Shepherd-Man-His-Paintings/dp/0715387561

https://davidshepherd.org/product/an-artist-in-conservation/

https://davidshepherd.org/product/my-painting-life-book/

https://books.google.com.sg/books/about/Painting_with_David_Shepherd.html?id=rxrkGIrrOZ8C&redir_esc=y

Other links:

http://www.artnet.com/artists/david-shepherd/

https://www.lowry.co.uk/davidshepherd-landscapes.html

https://davidshepherd.org/wildlife-art/