APA استشهاد

Barendt, E. (2005). Freedom of speech (2nd ed.). Oxford University Press.

استشهاد بنمط شيكاغو

Barendt, Eric. Freedom of Speech. 2nd ed. xxxviii, 526p: Oxford University Press, 2005.

MLA استشهاد

Barendt, Eric. Freedom of Speech. 2nd ed. Oxford University Press, 2005.