APA (7th ed.) Citation

O'Regan, T., & O'Regan, T. N. (1988). Sacred polychoral music in Rome, 1575-1621.

Chicago Style (17th ed.) Citation

O'Regan, T., and Thomas Noel O'Regan. Sacred Polychoral Music in Rome, 1575-1621. 1988.

MLA (9th ed.) Citation

O'Regan, T., and Thomas Noel O'Regan. Sacred Polychoral Music in Rome, 1575-1621. 1988.

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