APA (7th ed.) Citation

Duffley, P. J. (1992). The English infinitive. Longman.

Chicago Style (17th ed.) Citation

Duffley, Patrick J. The English Infinitive. London New York: Longman, 1992.

MLA (8th ed.) Citation

Duffley, Patrick J. The English Infinitive. Longman, 1992.

Warning: These citations may not always be 100% accurate.