Cita APA (7a ed.)

Postgate, R., Southwood, W. A., & Lewis, P. M. (1979). Low cost communication systems for educational and development purposes in third world countries. Unesco.

Cita Chicago Style (17a ed.)

Postgate, Richmond, William A. Southwood, y Peter M. Lewis. Low Cost Communication Systems for Educational and Development Purposes in Third World Countries. París: Unesco, 1979.

Cita MLA (8a ed.)

Postgate, Richmond, et al. Low Cost Communication Systems for Educational and Development Purposes in Third World Countries. Unesco, 1979.