APA Alıntı

Eckholm,Erik P. (1992). Down to earth: Environment and human needs. Affiliated east west press.

Chicago Stili Alıntı

Eckholm,Erik P. Down to Earth: Environment and Human Needs. New Delhi: Affiliated east west press, 1992.

MLA Alıntı

Eckholm,Erik P. Down to Earth: Environment and Human Needs. Affiliated east west press, 1992.