एपीए उद्धरण

Paul Heyer. (2019). Communication in history - stone age symbols to social media.

शिकागो स्टाइल उद्धरण

Paul Heyer. Communication in History - Stone Age Symbols to Social Media. Routledge, 2019.

एमएलए उद्धरण

Paul Heyer. Communication in History - Stone Age Symbols to Social Media. 2019.