Cita APA (7th ed.)

Gerber, P. L. (1975). Willa Cather. Twayne Publishers.

Cita Chicago (17th ed.)

Gerber, Philip L. Willa Cather. Boston: Twayne Publishers, 1975.

Cita MLA (9th ed.)

Gerber, Philip L. Willa Cather. Twayne Publishers, 1975.