Gaya APA

Beck, S, D., Swanson, C, P. (1963). **Animal photoperiodism relationship of daylength to animal growth, ì development, and behavior . New York: New York: Holt, Rinehart and Winston; 1963..

Gaya MLA

Beck, Stanley, D.., Swanson, Carl, P.. "**Animal photoperiodism relationship of daylength to animal growth, ì development, and behavior". New York: New York: Holt, Rinehart and Winston; 1963., 1963. Text.