APA (7th ed.) Citation

Simpson, H. R. (1965). Assignment for a mercenary ([1st ed.].). Harper & Row.

Chicago Style (17th ed.) Citation

Simpson, Howard R. Assignment for a Mercenary. [1st ed.]. New York: Harper & Row, 1965.

MLA (8th ed.) Citation

Simpson, Howard R. Assignment for a Mercenary. [1st ed.]. Harper & Row, 1965.