APA (7th ed.) Citation

MANDINO, O. (1978). The greatest salesman in the world. Bantam Books.

Chicago Style (17th ed.) Citation

MANDINO, OG. The Greatest Salesman in the World. Toronto: Bantam Books, 1978.

MLA (9th ed.) Citation

MANDINO, OG. The Greatest Salesman in the World. Bantam Books, 1978.