APA (7th ed.) Citation

Montgomery, M., Geary, S. P., & Ackroyd, D. (1999). In search of history. A&E Television Networks.

Chicago Style (17th ed.) Citation

Montgomery, Mark, Sean P. Geary, and David Ackroyd. In Search of History. New York, NY: A&E Television Networks, 1999.

MLA (9th ed.) Citation

Montgomery, Mark, et al. In Search of History. A&E Television Networks, 1999.