Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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