Cita APA (7th ed.)

Breck, A. d., & Yourgrau, W. (1972). Biology, history, and natural philosophy. Plenum Press.

Cita Chicago (17th ed.)

Breck, Allen duPont, i Wolfgang Yourgrau. Biology, History, and Natural Philosophy. New York: Plenum Press, 1972.

Cita MLA (8th ed.)

Breck, Allen duPont, i Wolfgang Yourgrau. Biology, History, and Natural Philosophy. Plenum Press, 1972.