References
- Burns , Ted and Micoleau , Tyler . 1957 . Tumbling techniques New York : Ronald Press. .
- Fait, Hollis F., and others . 1956 . Manual of physical education activities. Philadelphia : W. B. Saunders. .
- Hollingsworth , Cecil B. 1948 . Study of the factors involved in speed of learning and level of attainment of motor skills. Leland Stanford Junior University. . Unpublished dissertation for degree of doctor of education
- Hollingsworth , Cecil B. 1937 . The Problem of Assistance in Heavy Apparatus and Tumbling. Los Angeles : University of California. . Unpublished master's thesis
- La Porte , William R. and Renner , Al G. 1938 . The tumbler's manual. New York : Prentice-Hall. .
- Ryser , Otto E. 1951 . Teacher's manual for tumbling and apparatus stunts. Dubuque : Wm. C. Brown Company. .
- Stetson , R. H. and McDill , J. A. 1923 . Mechanism of the different types of movement . Psychol. Monogr. , 32 : 18 – 40 .
- Szypula , George . 1957 . Tumbling and balancing for all. Dubuque : Wm. C. Brown. .