APA (7th ed.) Citation

Gruber, D., Dunn, V., & Maley, A. (1987). Writing: Elementary. Oxford University Press.

Chicago Style (17th ed.) Citation

Gruber, Diann, Viviane Dunn, and Alan Maley. Writing: Elementary. Oxford: Oxford University Press, 1987.

MLA (9th ed.) Citation

Gruber, Diann, et al. Writing: Elementary. Oxford University Press, 1987.