Cita APA (7th ed.)

North, H. B. (1981). Commercial food patents, U.S. 1980. AVI.

Cita Chicago (17th ed.)

North, Hallie B. Commercial Food Patents, U.S. 1980. Westport, Conn: AVI, 1981.

Cita MLA (9th ed.)

North, Hallie B. Commercial Food Patents, U.S. 1980. AVI, 1981.