APA引文

(WWF), W. W. F. 781: Archief van World Wildlife Fund (WWF).

芝加哥风格引文

(WWF), World Wildlife Fund. 781: Archief Van World Wildlife Fund (WWF).

MLA引文

(WWF), World Wildlife Fund. 781: Archief Van World Wildlife Fund (WWF).

警告：这些引文格式不一定是100％准确.