APA引文

Onkar singh et al. (1993). Frontiers in environmental geography. Concept Publishing Company.

Chicago Edition Citation

Onkar singh et al. Frontiers in Environmental Geography. New Delhi: Concept Publishing Company, 1993.

MLA引文

Onkar singh et al. Frontiers in Environmental Geography. Concept Publishing Company, 1993.

警告:這些引文格式不一定是100%准確.