APA (7th ed.) Citation

Walles, M. (1991). Understanding the US presidency ([1st pub.].). Allan.

Chicago Style (17th ed.) Citation

Walles, Malcolm. Understanding the US Presidency. [1st pub.]. New York [etc.]: Allan, 1991.

MLA (9th ed.) Citation

Walles, Malcolm. Understanding the US Presidency. [1st pub.]. Allan, 1991.

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