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Crocker, Richard L. 1990. XIV. Polyphony in England in the Thirteenth Century. The New Oxford History of Music, II: The Early Middle Ages to 1300, edited by Richard L Crocker and David Hiley, 679-720. Oxford.

Crocker, Richard L. 1977. The Early Medieval Sequence.  Berkeley.

Crocker, Richard L. 1973. The Sequence. Gattungen der Musik in Einzeldarstellungen: Gedenkschrift Leo Schrade, edited by Wulf Arlt, Ernst Lichtenhahn,  and Hans Oesch, 269-322. Tübingen and Basel.

Crocker, Richard L. 1967. A new source for medieval music theory. Acta Musicologica, 39: .

Crocker, Richard L. 1966. A History of Musical Style. McGraw-Hill Series in Music.  New York: McGraw-Hill.