APA (7th ed.) Citation

Heinlein, R. A. (1966). The unpleasant proffesion of Jonathan Hoag. Penguin books.

Chicago Style (17th ed.) Citation

Heinlein, Robert A. The Unpleasant Proffesion of Jonathan Hoag. Middlesex: Penguin books, 1966.

MLA (8th ed.) Citation

Heinlein, Robert A. The Unpleasant Proffesion of Jonathan Hoag. Penguin books, 1966.

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