Παραπομπή APA

Heyer, P. a. U. (2019). Communication in History: Stone Age Symbols to Social Media (Seventh Edition.). Routledge.

Παραπομπή Chicago Style

Heyer, Paul and Urquhart. Communication in History: Stone Age Symbols to Social Media. Seventh Edition. New York: Routledge, 2019.

Παραπομπή MLA

Heyer, Paul and Urquhart. Communication in History: Stone Age Symbols to Social Media. Seventh Edition. Routledge, 2019.