Gaya APA

Swanson, C, P., Marsland, D. (NULL). Principles of modern biology . New: New York: Holt, Rinehart and Winston; 1964.

Gaya MLA

Swanson, Carl, P.., Marsland, Douglas. "Principles of modern biology". New: New York: Holt, Rinehart and Winston; 1964, NULL. Text.