APA-viite

Gardner, M., & Schroeder, T. (1997). Puzzling questions about the solar system. Dover Publications.

Chicago-tyylinen lähdeviittaus

Gardner, Martin, ja Ted Schroeder. Puzzling Questions About the Solar System. Mineola, N.Y.: Dover Publications, 1997.

MLA-viite

Gardner, Martin, ja Ted Schroeder. Puzzling Questions About the Solar System. Dover Publications, 1997.