APA

Grenfell R., . (1948). The Bismarck episode. New York: Macmillan.

Chicago

Grenfell Russell, . 1948. The Bismarck episode. New York: Macmillan.

Harvard

Grenfell R., . (1948). The Bismarck episode. New York: Macmillan.

MLA

Grenfell Russell, . The Bismarck episode. New York: Macmillan. 1948.