Cita APA (7a ed.)

Davies, D., & Pickett, D. (1990). Preparing for English commerce. Prentice Hall.

Cita Chicago Style (17a ed.)

Davies, David, y Douglas Pickett. Preparing for English Commerce. New York [etc.]: Prentice Hall, 1990.

Cita MLA (9a ed.)

Davies, David, y Douglas Pickett. Preparing for English Commerce. Prentice Hall, 1990.