(WWF), W. W. F. 781: Archief van World Wildlife Fund (WWF).
Chicagoスタイル(17版)引用形式(WWF), World Wildlife Fund. 781: Archief Van World Wildlife Fund (WWF).
MLA(8版)引用形式(WWF), World Wildlife Fund. 781: Archief Van World Wildlife Fund (WWF).
警告: この引用は必ずしも正確ではありません.