Cita APA (7a ed.)

Spencer, P. R., Fritschler, L. D., Dugger, E., & Houy, H. H. (1942). Exploring new trails. Lyons and Carnahan.

Cita Chicago Style (17a ed.)

Spencer, Paul R., Lois Duffin Fritschler, Ethel Dugger, y Henrietta H. Houy. Exploring New Trails. Chicago ; Dallas ; Los Angeles ; Atlanta ; New York: Lyons and Carnahan, 1942.

Cita MLA (8a ed.)

Spencer, Paul R., et al. Exploring New Trails. Lyons and Carnahan, 1942.