Cita APA

Petrson, R. T. (1963). birds. Time-Life Books.

Citación estilo Chicago

Petrson, Roger Tory. Birds. New York: Time-Life Books, 1963.

Cita MLA

Petrson, Roger Tory. Birds. Time-Life Books, 1963.

Warning: These citations may not always be 100% accurate.