APA
Bourke K., . (2003). English verbs and tenses. Oxford: Oxford University Press.
Chicago
Bourke Kenna, . 2003. English verbs and tenses. Oxford: Oxford University Press.
Harvard
Bourke K., . (2003). English verbs and tenses. Oxford: Oxford University Press.
MLA
Bourke Kenna, . English verbs and tenses. Oxford: Oxford University Press. 2003.