(1994). The Asian waterfowl census 1987-91: Distribution and status of Asian waterfowl. Gloucester, UK: International Waterfowl and Wetlands Research Bureau.
シカゴスタイル引用形The Asian Waterfowl Census 1987-91: Distribution and Status of Asian Waterfowl. Gloucester, UK: International Waterfowl and Wetlands Research Bureau, 1994.
MLA引用形式The Asian Waterfowl Census 1987-91: Distribution and Status of Asian Waterfowl. Gloucester, UK: International Waterfowl and Wetlands Research Bureau, 1994.
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