1. Socio-Economic Planning in Dak Lak: 1994–2010,1994
2. Bird Census Techniques;Bibby,2000
3. Brickle, N.W., Nguyen Cu, Ha Quy Quynh, Nguyen Thai Tu Cuong, Hoang Van San, 1998. The Status and Distribution of Green Peafowl in Dak Lak Province, Vietnam. BirdLife International—Vietnam Programme, Hanoi, Vietnam.
4. Distance Sampling: Estimating Abundance of Biological Populations;Buckland,1993
5. GLIM for Ecologists;Crawley,1993