Παραπομπή APA

Cunliffe, M. (1967). Literature of the United States (3rd ed.). Penguin.

Παραπομπή Chicago Style

Cunliffe, Marcus. Literature of the United States. 3rd ed. Middlesex: Penguin, 1967.

Παραπομπή MLA

Cunliffe, Marcus. Literature of the United States. 3rd ed. Penguin, 1967.