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.