Cita APA (7th ed.)

Armour, R. W. (1976). The happy bookers: A playful history of librarians and their world from the stone age to the distant future. McGraw-Hill Book Company.

Cita Chicago (17th ed.)

Armour, Richard Willard. The Happy Bookers: A Playful History of Librarians and Their World from the Stone Age to the Distant Future. New York: McGraw-Hill Book Company, 1976.

Cita MLA (9th ed.)

Armour, Richard Willard. The Happy Bookers: A Playful History of Librarians and Their World from the Stone Age to the Distant Future. McGraw-Hill Book Company, 1976.