Παραπομπή APA

Sexena,M K. (2013). Biosphere as an Ecosystem. ALP.

Παραπομπή Chicago Style

Sexena,M K. Biosphere as an Ecosystem. New Delhi: ALP, 2013.

Παραπομπή MLA

Sexena,M K. Biosphere as an Ecosystem. ALP, 2013.