Gaya APA

Swanson, C, P., Young, R, S. (1966). **Extraterrestrial biology . New York: New York: Holt, Rinehart and Winston; 1966..

Gaya MLA

Swanson, Carl, P.., Young, Richard, S.. "**Extraterrestrial biology". New York: New York: Holt, Rinehart and Winston; 1966., 1966. Text.