Gaya APA

Delany, S. et al (2002). Numbers and Distribution of Wintering Waterbirds in the Western Paleartic and Southwest Asia in 1997, 1998 and 1999: Results from the International Waterbird Census . : Wetlands International.

Gaya MLA

Delany, S.. et al. "Numbers and Distribution of Wintering Waterbirds in the Western Paleartic and Southwest Asia in 1997, 1998 and 1999: Results from the International Waterbird Census". : Wetlands International, 2002. Text.