(WWF), W. W. F. 781: Archief van World Wildlife Fund (WWF).
Chicago Style (17th ed.) Citation(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：這些引文格式不一定是100％准確.