Smith, H. R., & Nagle, T. S. (1972). Instructional media in the learning process. C. E. Merrill Pub. Co..
Cita Chicago (17th ed.)Smith, Hayden Richard, i Thomas S. Nagle. Instructional Media in the Learning Process. Columbus, Ohio: C. E. Merrill Pub. Co., 1972.
Cita MLA (8th ed.)Smith, Hayden Richard, i Thomas S. Nagle. Instructional Media in the Learning Process. C. E. Merrill Pub. Co., 1972.
Atenció: Aquestes cites poden no estar 100% correctes.