APA

(19). Pelican books. New York, N. Y. [u.a.]: Penguin Books.

Chicago

19. Pelican books. New York, N. Y. [u.a.]: Penguin Books.

Harvard

(19). Pelican books. New York, N. Y. [u.a.]: Penguin Books.

MLA

Pelican books. New York, N. Y. [u.a.]: Penguin Books. 19.