Cita APA (7th ed.)

Ardales, V. B. (1987). Introductory text to philosophy. Best Books.

Cita Chicago (17th ed.)

Ardales, Venancio B. Introductory Text to Philosophy. Makati: Best Books, 1987.

Cita MLA (9th ed.)

Ardales, Venancio B. Introductory Text to Philosophy. Best Books, 1987.