Cita APA (7th ed.)

Madison, A., & Drotar, D. L. (1978). Pocket calculators: How to use and enjoy them. T. Nelson.

Cita Chicago (17th ed.)

Madison, Arnold, i David L. Drotar. Pocket Calculators: How to Use and Enjoy Them. Nashville: T. Nelson, 1978.

Cita MLA (8th ed.)

Madison, Arnold, i David L. Drotar. Pocket Calculators: How to Use and Enjoy Them. T. Nelson, 1978.