Gaya APA

Sladen, B, K., Bang, F, B. (1969). Biology of Populations : the biological basis of public health . New York: American Elsevier Publising Company.

Gaya MLA

Sladen, Brenda, K., Bang, Frederik, B. "Biology of Populations : the biological basis of public health". New York: American Elsevier Publising Company, 1969. Text.