APA (7th ed.) Citation

Shapp, M., & Shapp, C. (1961). Let's find out what's in the sky. Franklin Watts.

Chicago Style (17th ed.) Citation

Shapp, Martha, and C. Shapp. Let's Find Out What's in the Sky. New York: Franklin Watts, 1961.

MLA (9th ed.) Citation

Shapp, Martha, and C. Shapp. Let's Find Out What's in the Sky. Franklin Watts, 1961.