Reinecke, R. D., & Herm, R. J. (1983). Refraction: A programmed text (3rd ed.). Appleton-Century-Crofts.
Cita Chicago (17th ed.)Reinecke, Robert D., i Robert J. Herm. Refraction: A Programmed Text. 3rd ed. Norwalk, CT: Appleton-Century-Crofts, 1983.
Cita MLA (9th ed.)Reinecke, Robert D., i Robert J. Herm. Refraction: A Programmed Text. 3rd ed. Appleton-Century-Crofts, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.