Cita APA (7a ed.)

Sinclair, J. (1972). A course in spoken english: Grammar. Oxford University.

Cita Chicago Style (17a ed.)

Sinclair, John. A Course in Spoken English: Grammar. London: Oxford University, 1972.

Cita MLA (9a ed.)

Sinclair, John. A Course in Spoken English: Grammar. Oxford University, 1972.