APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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