APA (7th ed.) Citation

Moore, M., Costello, B., Goodridge, C., & Miller, C. (1998). Selected letters. Penguin Books.

Chicago Style (17th ed.) Citation

Moore, Marianne, Bonnie Costello, Celeste Goodridge, and Cristanne Miller. Selected Letters. New York: Penguin Books, 1998.

MLA (9th ed.) Citation

Moore, Marianne, et al. Selected Letters. Penguin Books, 1998.