Cita APA (7a ed.)

Ullman, J. R. (1945). The white tower (6a. ed.). Lippincott Co..

Cita Chicago Style (17a ed.)

Ullman, James Ramsey. The White Tower. 6a. ed. Philadelphia: Lippincott Co., 1945.

Cita MLA (8a ed.)

Ullman, James Ramsey. The White Tower. 6a. ed. Lippincott Co., 1945.