APA (7th ed.) Citation

Walker, K. R. (1966). The days the Presidents died: Leading men, issues, and ideas. Pioneer Press].

Chicago Style (17th ed.) Citation

Walker, Kenneth Roland. The Days the Presidents Died: Leading Men, Issues, and Ideas. [Little Rock, Ark.: Pioneer Press], 1966.

MLA (8th ed.) Citation

Walker, Kenneth Roland. The Days the Presidents Died: Leading Men, Issues, and Ideas. Pioneer Press], 1966.