Kruewan Pipatsawasdikul และผู้แต่งคนอื่นๆ. (2009) Distribution of the big-headed turtle Platysternon megacephalum Gray, 1831 in Thailand and a case study on population status and conservation management at Chiang Dao Wildlife Sanctuary, Chiang Mai Province. Chulalongkorn University:ม.ป.ท.Kruewan Pipatsawasdikul และผู้แต่งคนอื่นๆ. 2009. Distribution of the big-headed turtle Platysternon megacephalum Gray, 1831 in Thailand and a case study on population status and conservation management at Chiang Dao Wildlife Sanctuary, Chiang Mai Province. ม.ป.ท.:Chulalongkorn University;Kruewan Pipatsawasdikul และผู้แต่งคนอื่นๆ. Distribution of the big-headed turtle Platysternon megacephalum Gray, 1831 in Thailand and a case study on population status and conservation management at Chiang Dao Wildlife Sanctuary, Chiang Mai Province. ม.ป.ท.:Chulalongkorn University, 2009. Print.