Cita APA

Mark, J., Spellman, F., & Peale, N. V. (1954). Understanding. K. H. Volk.

Citación estilo Chicago

Mark, Julius, Francis Spellman, and Norman Vincent Peale. Understanding. New York: K. H. Volk, 1954.

Cita MLA

Mark, Julius, et al. Understanding. K. H. Volk, 1954.