Citazione Stile APA (7a Edizione)

Willis K.J & McElwain, J. (2002). The evolution of plants. Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Willis K.J e J.C McElwain. The Evolution of Plants. New York: Oxford University Press, 2002.

Citatione MLA (9a ed.)

Willis K.J e J.C McElwain. The Evolution of Plants. Oxford University Press, 2002.