APA-referens (7:e uppl.)

Barr, A. S., Burton, W. H., & Brueckner, L. J. (1947). Supervision: Democratic leadership in the improvement of learning (2a. ed.). Appleton-Century-Crofts.

Chicago-referens (17:e uppl.)

Barr, A. S., William H. Burton, och Leo J. Brueckner. Supervision: Democratic Leadership in the Improvement of Learning. 2a. ed. Nueva York: Appleton-Century-Crofts, 1947.

MLA-referens (9:e uppl.)

Barr, A. S., et al. Supervision: Democratic Leadership in the Improvement of Learning. 2a. ed. Appleton-Century-Crofts, 1947.