APA-referens (7:e uppl.)

Wittich, W. A., & Schuller, C. F. (1979). Instructional technology: Its nature and use (6th ed.). Harper & Row.

Chicago-referens (17:e uppl.)

Wittich, Walter Arno, och Charles Francis Schuller. Instructional Technology: Its Nature and Use. 6th ed. New York: Harper & Row, 1979.

MLA-referens (8:e uppl.)

Wittich, Walter Arno, och Charles Francis Schuller. Instructional Technology: Its Nature and Use. 6th ed. Harper & Row, 1979.