Gaya APA

, ., Beck, S, D. (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.. "Animal photoperiodism Relationship of daylength to animal growth, ì development, and behavior". New York: New York: Holt, Rinehart and Winston; 1963, 1963. Text.