Cita APA (7a ed.)

Sparks, J. D. (1981). Overhead projection. Educational Technology Publications.

Cita Chicago Style (17a ed.)

Sparks, Jerry D. Overhead Projection. Englewood Cliffs: Educational Technology Publications, 1981.

Cita MLA (9a ed.)

Sparks, Jerry D. Overhead Projection. Educational Technology Publications, 1981.