APA (7th ed.) Citation

O'Connor, W. (1991). Opus Dei, an open book: A replay to The secret world of Opus Dei by Michael Walsh. Mercier.

Chicago Style (17th ed.) Citation

O'Connor, William. Opus Dei, an Open Book: A Replay to The Secret World of Opus Dei by Michael Walsh. Cork: Mercier, 1991.

MLA (9th ed.) Citation

O'Connor, William. Opus Dei, an Open Book: A Replay to The Secret World of Opus Dei by Michael Walsh. Mercier, 1991.

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