Cita APA (7a ed.)
Ferm, V. (1969). Basic philosophy for beginners. The Christopher Publishing House.
Cita Chicago Style (17a ed.)
Ferm, Vergilius. Basic Philosophy for Beginners. North Quincy, Mass.: The Christopher Publishing House, 1969.
Cita MLA (9a ed.)
Ferm, Vergilius. Basic Philosophy for Beginners. The Christopher Publishing House, 1969.
Precaución: Estas citas no son 100% exactas.