Cita APA (7a ed.)

Gerlach, V. S., & Ely, D. P. (1971). Teaching and media: A systematic approach. Prentice-Hall.

Cita Chicago Style (17a ed.)

Gerlach, Vernon S., y Donald P. Ely. Teaching and Media: A Systematic Approach. Englewood Cliffs, N.J: Prentice-Hall, 1971.

Cita MLA (9a ed.)

Gerlach, Vernon S., y Donald P. Ely. Teaching and Media: A Systematic Approach. Prentice-Hall, 1971.