Citazione Stile APA (7a Edizione)

Ryburn, W. M., & Forge, K. B. (1957). Principles of teaching (2d ed.). Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Ryburn, William Morton, e Kenneth B. Forge. Principles of Teaching. 2d ed. London: Oxford University Press, 1957.

Citatione MLA (8a ed.)

Ryburn, William Morton, e Kenneth B. Forge. Principles of Teaching. 2d ed. Oxford University Press, 1957.