(WWF), W. W. F. 781: Archief van World Wildlife Fund (WWF).
Cita Chicago (17th ed.)(WWF), World Wildlife Fund. 781: Archief Van World Wildlife Fund (WWF).
Cita MLA (8th ed.)(WWF), World Wildlife Fund. 781: Archief Van World Wildlife Fund (WWF).
Atenció: Aquestes cites poden no estar 100% correctes.