Cita APA (7th ed.)

Maley, A., & Duff, A. (1976). Words! Cambridge University Press.

Cita Chicago (17th ed.)

Maley, Alan, i Alan Duff. Words! Nueva York: Cambridge University Press, 1976.

Cita MLA (9th ed.)

Maley, Alan, i Alan Duff. Words! Cambridge University Press, 1976.