APA

Cohen J. M., Cohen M. J., . (1971). The Penguin dictionary of modern quotations. Harmondsworth: Penguin.

Chicago

Cohen J M, Cohen M J, . 1971. The Penguin dictionary of modern quotations. Harmondsworth: Penguin.

Harvard

Cohen J. M., Cohen M. J., . (1971). The Penguin dictionary of modern quotations. Harmondsworth: Penguin.

MLA

Cohen J M, Cohen M J, . The Penguin dictionary of modern quotations. Harmondsworth: Penguin. 1971.