Cita APA (7th ed.)

Hellman, H. (1972). Feeding the world of the future. M. Evans; distributed in association with Lippincott, Philadelphia.

Cita Chicago (17th ed.)

Hellman, Hal. Feeding the World of the Future. New York: M. Evans; distributed in association with Lippincott, Philadelphia, 1972.

Cita MLA (8th ed.)

Hellman, Hal. Feeding the World of the Future. M. Evans; distributed in association with Lippincott, Philadelphia, 1972.