Cita APA (7a ed.)

Howatt, A. P. R., Webb, J., & Knight, M. (1972). A modern course in Business English: Book 3, Programmed units (1st ed., 6th imp.). Oxford University Press.

Cita Chicago Style (17a ed.)

Howatt, Anthony P. R., John Webb, y Michael Knight. A Modern Course in Business English: Book 3, Programmed Units. 1st ed., 6th imp. London: Oxford University Press, 1972.

Cita MLA (9a ed.)

Howatt, Anthony P. R., et al. A Modern Course in Business English: Book 3, Programmed Units. 1st ed., 6th imp. Oxford University Press, 1972.