Cita APA (7a ed.)

Zirkle, C. (1935). The beginnings of plant hybridization. University of Pennsylvania Press ; Oxford University Press.

Cita Chicago Style (17a ed.)

Zirkle, Conway. The Beginnings of Plant Hybridization. Philadelphia: University of Pennsylvania Press ; Oxford University Press, 1935.

Cita MLA (8a ed.)

Zirkle, Conway. The Beginnings of Plant Hybridization. University of Pennsylvania Press ; Oxford University Press, 1935.