Cita APA (7a ed.)

Fowler, W. S. (1976). Proficiency English. Thomas Nelson and Sons Ltd.

Cita Chicago Style (17a ed.)

Fowler, W. S. Proficiency English. London, etc.: Thomas Nelson and Sons Ltd, 1976.

Cita MLA (9a ed.)

Fowler, W. S. Proficiency English. Thomas Nelson and Sons Ltd, 1976.