Cita APA (7th ed.)

Bourke, K. (2003). English verbs and tenses. Oxford University Press.

Cita Chicago (17th ed.)

Bourke, Kenna. English Verbs and Tenses. Oxford: Oxford University Press, 2003.

Cita MLA (9th ed.)

Bourke, Kenna. English Verbs and Tenses. Oxford University Press, 2003.