Παραπομπή σε μορφή APA (7η εκδ.)

Gropper, G. L., & Glasgow, Z. (1971). Criteria for the selection and use of visuals in instruction: A handbook. Educational Technology.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gropper, George L., και Zita Glasgow. Criteria for the Selection and Use of Visuals in Instruction: A Handbook. Englewood Cliffs, NJ: Educational Technology, 1971.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gropper, George L., και Zita Glasgow. Criteria for the Selection and Use of Visuals in Instruction: A Handbook. Educational Technology, 1971.