Cita APA (7a ed.)

Crowley, D., & Heyer, P. (1991). Communication in history: Technolohy, culture, society. Longman.

Cita Chicago Style (17a ed.)

Crowley, David, y Paul Heyer. Communication in History: Technolohy, Culture, Society. London [etc.]: Longman, 1991.

Cita MLA (9a ed.)

Crowley, David, y Paul Heyer. Communication in History: Technolohy, Culture, Society. Longman, 1991.