Cita APA

Ryman, G., & Ryman, G. (1994). Unconquered countries: Four novellas. New York, New York: St. Martin.

Citación estilo Chicago

Ryman, Geoff, y Geoff Ryman. Unconquered Countries: Four Novellas. New York, New York: St. Martin, 1994.

Cita MLA

Ryman, Geoff, y Geoff Ryman. Unconquered Countries: Four Novellas. New York, New York: St. Martin, 1994.