APA (7th ed.) Citation

Buchan, E. (2004). That certain age. Penguin Books.

Chicago Style (17th ed.) Citation

Buchan, Elizabeth. That Certain Age. London: Penguin Books, 2004.

MLA (8th ed.) Citation

Buchan, Elizabeth. That Certain Age. Penguin Books, 2004.

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