APA (7th ed.) Citation

Axelrod, A. (1999). The complete idiot's guide to 20th century history. Alpha Books.

Chicago Style (17th ed.) Citation

Axelrod, Alan. The Complete Idiot's Guide to 20th Century History. New York: Alpha Books, 1999.

MLA (9th ed.) Citation

Axelrod, Alan. The Complete Idiot's Guide to 20th Century History. Alpha Books, 1999.