APA (7th ed.) Citation

Owen, J. P., Leblanc, B., & Preiss, D. (2017). Just move!: A new approach to fitness after 50. National Geographic.

Chicago Style (17th ed.) Citation

Owen, James P., Brigitte Leblanc, and David Preiss. Just Move!: A New Approach to Fitness After 50. Washington, D.C.: National Geographic, 2017.

MLA (8th ed.) Citation

Owen, James P., et al. Just Move!: A New Approach to Fitness After 50. National Geographic, 2017.

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