Franklin, E. N. (2010). Happy feet: Dynamic base, effortless posture : Franklin Ball and imagery exercises for the feet, knees, and lower legs. OPTP.
Lua i Stíl Chicago (17ú heag.)Franklin, Eric N. Happy Feet: Dynamic Base, Effortless Posture : Franklin Ball and Imagery Exercises for the Feet, Knees, and Lower Legs. Minneapolis, Minn.: OPTP, 2010.
Lua MLA (9ú heag.)Franklin, Eric N. Happy Feet: Dynamic Base, Effortless Posture : Franklin Ball and Imagery Exercises for the Feet, Knees, and Lower Legs. OPTP, 2010.
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