Cita APA (7a ed.)

Frankowski, L. (1990). The cross-time engineer. Ballantine Books.

Cita Chicago Style (17a ed.)

Frankowski, Leo. The Cross-time Engineer. New York: Ballantine Books, 1990.

Cita MLA (9a ed.)

Frankowski, Leo. The Cross-time Engineer. Ballantine Books, 1990.