APA引文

Heptulla, N. (1993). Environmental protection in developing countries. Oxford and IBH.

Chicago Edition Citation

Heptulla, Najma. Environmental Protection in Developing Countries. NMew Delhi: Oxford and IBH, 1993.

MLA引文

Heptulla, Najma. Environmental Protection in Developing Countries. Oxford and IBH, 1993.

警告：这些引文格式不一定是100％准确.