APA (7th ed.) Citation

Gulland, D. (1994). Penguin dictionary of English idioms. Penguin Books.

Chicago Style (17th ed.) Citation

Gulland, D. Penguin Dictionary of English Idioms. New Delhi: Penguin Books, 1994.

MLA (9th ed.) Citation

Gulland, D. Penguin Dictionary of English Idioms. Penguin Books, 1994.