Gropper, G. L., Glasgow, Z., & Klingensmith, J. (1971). Criteria for the selection and use of visuals in instruction: A handbook. Educational Technology Publications.
Chicago Style (17th ed.) CitationGropper, George L., Zita Glasgow, and Jean Klingensmith. Criteria for the Selection and Use of Visuals in Instruction: A Handbook. Englewood Cliffs, N.J.: Educational Technology Publications, 1971.
MLA (8th ed.) CitationGropper, George L., et al. Criteria for the Selection and Use of Visuals in Instruction: A Handbook. Educational Technology Publications, 1971.
Warning: These citations may not always be 100% accurate.