APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Knott, Robert, et al. Robert B. Parker's Ironhorse. Random House Audio : Books on Tape, 2013.