Cita APA (7a ed.)

Johnson, C. R., Hunt, F. M., & Siebert, M. J. (1994). Discrimination training in the treatment of pica and food scaveging. [s.n.].

Cita Chicago Style (17a ed.)

Johnson, Cynthia R., Frances M. Hunt, y Mary Jo Siebert. Discrimination Training in the Treatment of Pica and Food Scaveging. [S.l.]: [s.n.], 1994.

Cita MLA (9a ed.)

Johnson, Cynthia R., et al. Discrimination Training in the Treatment of Pica and Food Scaveging. [s.n.], 1994.