APA (7th ed.) Citation

Crocker, R. L. An introduction to Gregorian chant: Richard L. Crocker. Yale Univ. Press.

Chicago Style (17th ed.) Citation

Crocker, Richard L. An Introduction to Gregorian Chant: Richard L. Crocker. New Haven, Conn. [u.a.]: Yale Univ. Press.

MLA (9th ed.) Citation

Crocker, Richard L. An Introduction to Gregorian Chant: Richard L. Crocker. Yale Univ. Press.

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