APA استشهاد

Chafee, Z. (1954). Free speech in United States. Harward University press.

استشهاد بنمط شيكاغو

Chafee, Zechariach. Free Speech in United States. Cambridge: Harward University press, 1954.

MLA استشهاد

Chafee, Zechariach. Free Speech in United States. Harward University press, 1954.