APA (7th ed.) Citation

Polgreen, J., & Polgreen, C. (1963). The earth in space. Random House.

Chicago Style (17th ed.) Citation

Polgreen, John, and Cathleen Polgreen. The Earth in Space. New York: Random House, 1963.

MLA (9th ed.) Citation

Polgreen, John, and Cathleen Polgreen. The Earth in Space. Random House, 1963.