Επιλέγοντας προσωπικό γυμναστή

Scott O. Roberts, The business of personal training(chapter 1-2), 1996 by Human Kinetics Publishers

Fischer DV, Bryant J., Effect of certified personal trainer services on stage of exercise behavior and exercise mediators in female college students, 2008 , Department of Physical Education, College of Saint Benedict, 37 South College Avenue, Saint Joseph

Ratamess NA, Faigenbaum AD, Hoffman JR, Kang J., Self-selected resistance training intensity in healthy women: the influence of a personal trainer, 2008 , Department of Health and Exercise Science, The College of New Jersey, Ewing, New Jersey, USA.