References
RESEARCH JOURNALS
Ajzen, I. (1991). The theory of planned behavior. Organizational Behavior and Human Decision Processes, 50, 179-211.
Ducarme, F., Luque, G. M., & Courchamp, F. (2013). What are “charismatic species” for conservation biologists? Biosciences Master Reviews, 10, 1-8.
Eccles, J. S. (1999). The development of children ages 6 to 14. The Future of Children, 9, 30-44.
REPORTS
Brian D. Horne, Colin M. Poole and Andrew D. Walde (eds). 2012. Conservation of Asian Tortoises and Freshwater Turtles: Setting Priorities for the Next Ten Years. Recommendations and Conclusions from the Workshop in Singapore, February 21-24, 2011.
ONLINE NEWS ARTICLES
Chew, H. M. (2015, November 4). Singapore-China ties: 7 things to know about 25 years of diplomatic relations. The Straits Times. Retrieved from http://www.straitstimes.com/singapore/singapore-china-ties-7-things-to-know-about-25-years-of-diplomatic-relations
Nair, S. (2016, June 1). Jurong Bird Park moving to Mandai: 5 interesting facts about Singapore’s oldest wildlife park. The Straits Times. Retrieved from http://www.straitstimes.com/singapore/environment/jurong-bird-park-moving-to-mandai-5-interesting-facts-about-singapores-oldest
WIKIPEDIA
Jurong Bird Park. (2017, 16 November). In Wikipedia. Retrieved November 17, 2017, from https://en.wikipedia.org/wiki/Jurong_Bird_Park
Night Safari, Singapore. (2017, 8 June). In Wikipedia. Retrieved November 15, 2017, from https://en.wikipedia.org/wiki/Night_Safari,_Singapore
River Safari. (2017, 14 October). In Wikipedia. Retrieved November 15, 2017, from https://en.wikipedia.org/wiki/River_Safari
Singapore Zoo. (2017, 30 October). In Wikipedia. Retrieved November 15, 2017, from https://en.wikipedia.org/wiki/Singapore_Zoo
Wildlife Reserves Singapore. (2015, 7 August). In Wikipedia. Retrieved November 15, 2017, from https://en.wikipedia.org/wiki/Wildlife_Reserves_Singapore