APA-referens (7:e uppl.)

Smith, K. J. (1987). The nature of mathematics (5th ed.). Brooks/Cole Pub. Co..

Chicago-referens (17:e uppl.)

Smith, Karl J. The Nature of Mathematics. 5th ed. Monterey, Calif.: Brooks/Cole Pub. Co., 1987.

MLA-referens (9:e uppl.)

Smith, Karl J. The Nature of Mathematics. 5th ed. Brooks/Cole Pub. Co., 1987.