Dyfyniad APA

(1994). The Asian waterfowl census 1987-91: Distribution and status of Asian waterfowl. Gloucester, UK: International Waterfowl and Wetlands Research Bureau.

Dyfyniad Arddull Chicago

The Asian Waterfowl Census 1987-91: Distribution and Status of Asian Waterfowl. Gloucester, UK: International Waterfowl and Wetlands Research Bureau, 1994.

Dyfyniad MLA

The Asian Waterfowl Census 1987-91: Distribution and Status of Asian Waterfowl. Gloucester, UK: International Waterfowl and Wetlands Research Bureau, 1994.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.