Gaya APA

, ., Smith, E, T. (1959). Biology the science of living things . New York: New York: Harcourt, Brace and Company; 1959.

Gaya MLA

, ., Smith, Ella, Thea. "Biology the science of living things". New York: New York: Harcourt, Brace and Company; 1959, 1959. Text.