Lerson Vasinopas และผู้แต่งคนอื่นๆ. (2009) Bird species diversity in Phu Khao Tong Area, Kang Khoi District, Saraburi province. Chulalongkorn University:ม.ป.ท.Lerson Vasinopas และผู้แต่งคนอื่นๆ. 2009. Bird species diversity in Phu Khao Tong Area, Kang Khoi District, Saraburi province. ม.ป.ท.:Chulalongkorn University;Lerson Vasinopas และผู้แต่งคนอื่นๆ. Bird species diversity in Phu Khao Tong Area, Kang Khoi District, Saraburi province. ม.ป.ท.:Chulalongkorn University, 2009. Print.