Gaya APA

Wolfson, M., Swanson, C, P. (NULL). Changing approaches to population problem . New: New Delhi: Oxford 7 Ibh Pubishing Co.; 1978.

Gaya MLA

Wolfson, Margaret., Swanson, Carl, P.. "Changing approaches to population problem". New: New Delhi: Oxford 7 Ibh Pubishing Co.; 1978, NULL. Text.