Wanlop Payakkasem. 2001. A self-learning computer program for teachers [grade 7] on the topic of wildlife and forest ecosystems. Field of Study Information Management of Environments and Natural Resources, Mahidol University;

Wanlop Payakkasem. A self-learning computer program for teachers [grade 7] on the topic of wildlife and forest ecosystems. . Bangkok:Mahidol University, 2001.

Wanlop Payakkasem. (2001) A self-learning computer program for teachers [grade 7] on the topic of wildlife and forest ecosystems . Mahidol University/Bangkok.