Cita APA (7a ed.)

Smith, M. H., Prescott, C. S., & Bellino, R. D. (1978). Our earth ([Student's edition].). The Fideler Company.

Cita Chicago Style (17a ed.)

Smith, Marion Hagens, Carol S. Prescott, y R. Dale Bellino. Our Earth. [Student's edition]. Grand Rapids, Michigan Toronto, Canada: The Fideler Company, 1978.

Cita MLA (9a ed.)

Smith, Marion Hagens, et al. Our Earth. [Student's edition]. The Fideler Company, 1978.