APA (7th ed.) Citation

Gregory, C., Gregory, D. C. T., & Parrott, D. (2013). The end of Richelieu.

Chicago Style (17th ed.) Citation

Gregory, C., Dr Charles T. Gregory, and D. Parrott. The End of Richelieu. 2013.

MLA (9th ed.) Citation

Gregory, C., et al. The End of Richelieu. 2013.