O'Hara, V. (1990). The fitness option: Five weeks to healing stress (2nd ed.). Dawn.
Chicago Style (17. basım) AtıfO'Hara, Valerie. The Fitness Option: Five Weeks to Healing Stress. 2nd ed. Nevada City, CA: Dawn, 1990.
MLA (9th ed.) AtıfO'Hara, Valerie. The Fitness Option: Five Weeks to Healing Stress. 2nd ed. Dawn, 1990.
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