APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.