APA (7th ed.) Citation

Kagan, D. (2008). Donald Kagan. The Dark Ages. (2).

Chicago Style (17th ed.) Citation

Kagan, Donald. Donald Kagan. The Dark Ages. (2). 2008.

MLA (9th ed.) Citation

Kagan, Donald. Donald Kagan. The Dark Ages. (2). 2008.

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