Philosophy : who needs it

MLA

Rand, Ayn, and Leonard Peikoff. Philosophy : Who Needs It. Centennial ed. New York: Signet Book, .198.

APA

Rand, A., & Peikoff, L. (.198). Philosophy : who needs it. Centennial ed. New York: Signet Book.

Chicago

Rand, Ayn, and Leonard Peikoff. Philosophy: Who Needs it. Centennial ed. New York: Signet Book, .198.