Gaya APA

Pangabean, F. et al (2001). Survey on the Occurence of and Threats of the White-winged Wood Duck (Cairina Scutulata) in North Sumatra . : Wetlands International.

Gaya MLA

Pangabean, F.A.. et al. "Survey on the Occurence of and Threats of the White-winged Wood Duck (Cairina Scutulata) in North Sumatra". : Wetlands International, 2001. Text.