Cita APA (7a ed.)

Walsh, M. (1989). The secret world of Opus Dei. Rialp.

Cita Chicago Style (17a ed.)

Walsh, Michael. The Secret World of Opus Dei. Madrid: Rialp, 1989.

Cita MLA (9a ed.)

Walsh, Michael. The Secret World of Opus Dei. Rialp, 1989.