Ellgen, P. (2015). Psoas strength and flexibility: Core workouts to increase mobility, reduce injuries and end back pain. Ulysses Press.
Cita Chicago Style (17a ed.)Ellgen, Pamela. Psoas Strength and Flexibility: Core Workouts to Increase Mobility, Reduce Injuries and End Back Pain. Berklely, CA: Ulysses Press, 2015.
Cita MLA (8a ed.)Ellgen, Pamela. Psoas Strength and Flexibility: Core Workouts to Increase Mobility, Reduce Injuries and End Back Pain. Ulysses Press, 2015.
Precaución: Estas citas no son 100% exactas.