Cita APA (7a ed.)

Spier, J. M., & Freedman, D. H. (1954). An introduction to christian philosophy. The Presbyterian and Reformed Phublisching Company.

Cita Chicago Style (17a ed.)

Spier, Johannes Marinus, y David Hugh Freedman. An Introduction to Christian Philosophy. Philadelphia: The Presbyterian and Reformed Phublisching Company, 1954.

Cita MLA (9a ed.)

Spier, Johannes Marinus, y David Hugh Freedman. An Introduction to Christian Philosophy. The Presbyterian and Reformed Phublisching Company, 1954.