APA (7th ed.) Citation

Groos, A., & Lacy, N. J. (2002). Perceval =: Parzival : a casebook. Routledge.

Chicago Style (17th ed.) Citation

Groos, Arthur, and Norris J. Lacy. Perceval =: Parzival : A Casebook. New York: Routledge, 2002.

MLA (9th ed.) Citation

Groos, Arthur, and Norris J. Lacy. Perceval =: Parzival : A Casebook. Routledge, 2002.