APA Edition Citation

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 Edition Citation

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

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.