APA (7th ed.) Citation

Parker, R. B., Knott, R., & Welliver, T. (2013). Robert B. Parker's Ironhorse. Random House Audio.

Chicago Style (17th ed.) Citation

Parker, Robert B., Robert Knott, and Titus Welliver. Robert B. Parker's Ironhorse. [New York]: Random House Audio, 2013.

MLA (8th ed.) Citation

Parker, Robert B., et al. Robert B. Parker's Ironhorse. Random House Audio, 2013.

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