APA (7th ed.) Citation

Selsam, H. (1939). What is philosophy?: A Marxist introd ((2. <rev.> ed.).). Internat. Publ.

Chicago Style (17th ed.) Citation

Selsam, Howard. What Is Philosophy?: A Marxist Introd. (2. <rev.> ed.). New York: Internat. Publ, 1939.

MLA (9th ed.) Citation

Selsam, Howard. What Is Philosophy?: A Marxist Introd. (2. <rev.> ed.). Internat. Publ, 1939.