Cita APA (7th ed.)

Udall, S. (1974). The energy balloon. McGraw-Hill Book Company.

Cita Chicago (17th ed.)

Udall, Stewart. The Energy Balloon. New York: McGraw-Hill Book Company, 1974.

Cita MLA (9th ed.)

Udall, Stewart. The Energy Balloon. McGraw-Hill Book Company, 1974.