Cita APA (7a ed.)

Walsh, M. J. (1990). The secret world of Opus Dei. Grafton.

Cita Chicago Style (17a ed.)

Walsh, Michael J. The Secret World of Opus Dei. London: Grafton, 1990.

Cita MLA (9a ed.)

Walsh, Michael J. The Secret World of Opus Dei. Grafton, 1990.