Gaya APA

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

Gaya MLA

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