APA (7th ed.) Citation

Shapp, M., & Shapp, C. (1963). Let's find out about air. Franklin Watts.

Chicago Style (17th ed.) Citation

Shapp, Martha, and C. Shapp. Let's Find Out About Air. New York: Franklin Watts, 1963.

MLA (9th ed.) Citation

Shapp, Martha, and C. Shapp. Let's Find Out About Air. Franklin Watts, 1963.