APA (7th ed.) Citation

O'Connor, B., & Wells, C. (1999). Health and fitness -over 50. The Crowood Press Ltd.

Chicago Style (17th ed.) Citation

O'Connor, Bob, and Christine Wells. Health and Fitness -over 50. Wiltshire: The Crowood Press Ltd, 1999.

MLA (9th ed.) Citation

O'Connor, Bob, and Christine Wells. Health and Fitness -over 50. The Crowood Press Ltd, 1999.