Cita APA (7a ed.)

Royston, O. M., & Harrison, M. (1968). Late nineteenth century (1. publ., 2. impression.). Allen & Unwin.

Cita Chicago Style (17a ed.)

Royston, O. M., y Molly Harrison. Late Nineteenth Century. 1. publ., 2. impression. London: Allen & Unwin, 1968.

Cita MLA (9a ed.)

Royston, O. M., y Molly Harrison. Late Nineteenth Century. 1. publ., 2. impression. Allen & Unwin, 1968.