WWF India. (1994). Enviournmental NGOs in India. WWF Indias 7 ENVIS centre.
芝加哥风格引文WWF India. Enviournmental NGOs in India. New delhi: WWF Indias 7 ENVIS centre, 1994.
MLA引文WWF India. Enviournmental NGOs in India. WWF Indias 7 ENVIS centre, 1994.
警告：这些引文格式不一定是100％准确.