APA (7th ed.) Citation

Coelho, P., & Clarke, A. R. (1998). The valkyries: An encounter with angels. Harper Perennial.

Chicago Style (17th ed.) Citation

Coelho, Paula, and Alan R. Clarke. The Valkyries: An Encounter with Angels. New York: Harper Perennial, 1998.

MLA (9th ed.) Citation

Coelho, Paula, and Alan R. Clarke. The Valkyries: An Encounter with Angels. Harper Perennial, 1998.