APA

Robertson J. G., Purdie E., . (1962). A history of German literature. New York: British Book Centre.

Chicago

Robertson John George, Purdie Edna, . 1962. A history of German literature. New York: British Book Centre.

Harvard

Robertson J. G., Purdie E., . (1962). A history of German literature. New York: British Book Centre.

MLA

Robertson John George, Purdie Edna, . A history of German literature. New York: British Book Centre. 1962.