Cita APA (7th ed.)

Geisler, Norman L, & Feinberg, P. D. (1987). Introduction to Philosophy: A Christian Perspective (2nd ed.). Baker Academic.

Cita Chicago (17th ed.)

Geisler, Norman L, i Paul D. Feinberg. Introduction to Philosophy: A Christian Perspective. 2nd ed. Grand Rapids, MI: Baker Academic, 1987.

Cita MLA (9th ed.)

Geisler, et al. Introduction to Philosophy: A Christian Perspective. 2nd ed. Baker Academic, 1987.