APA aipamena

Walpole, H. (1930). Fortitude. New York: The Modern Library.

Chicago Style aipamena

Walpole, Hugh. Fortitude. New York: The Modern Library, 1930.

MLA aipamena

Walpole, Hugh. Fortitude. New York: The Modern Library, 1930.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.