Thailand. Krom Songsœ̄m Khunnaphāp Singwǣtlō̜m. (2004). Saphan Seekhieo: The green bridge : towards practical environmental education. Department of Environmental Quality Promotion, Ministry of Science, Technology and Environment.
Chicago-viite (17. p.)Thailand. Krom Songsœ̄m Khunnaphāp Singwǣtlō̜m. Saphan Seekhieo: The Green Bridge : Towards Practical Environmental Education. Bangkok: Department of Environmental Quality Promotion, Ministry of Science, Technology and Environment, 2004.
MLA-viite (8. p.)Thailand. Krom Songsœ̄m Khunnaphāp Singwǣtlō̜m. Saphan Seekhieo: The Green Bridge : Towards Practical Environmental Education. Department of Environmental Quality Promotion, Ministry of Science, Technology and Environment, 2004.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.