APA

Speirs J., Ford B., Doyle A. I. & Holbrook D. (1966). The Age of Chaucer. London: Penguin Books.

Chicago

Speirs John, Ford Boris, Doyle A I and Holbrook David. 1966. The Age of Chaucer. London: Penguin Books.

Harvard

Speirs J., Ford B., Doyle A. I. and Holbrook D. (1966). The Age of Chaucer. London: Penguin Books.

MLA

Speirs John, Ford Boris, Doyle A I and Holbrook David. The Age of Chaucer. London: Penguin Books. 1966.