APA (7th ed.) Citation

Leighton, I. (1964). The Aspirin age, 1919-41. Penguin Books.

Chicago Style (17th ed.) Citation

Leighton, Isabel. The Aspirin Age, 1919-41. Harmondsworth: Penguin Books, 1964.

MLA (8th ed.) Citation

Leighton, Isabel. The Aspirin Age, 1919-41. Penguin Books, 1964.

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