APA (7th ed.) Citation

O'Leary, D. L. The Difnar (antiphonarium) of the Coptic Church. Luzac.

Chicago Style (17th ed.) Citation

O'Leary, De Lacy. The Difnar (antiphonarium) of the Coptic Church. London: Luzac.

MLA (9th ed.) Citation

O'Leary, De Lacy. The Difnar (antiphonarium) of the Coptic Church. Luzac.

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