Cullum, R. (1988). The English YMCA: Guide To Exercise To Music. Pelham Books.
Lua i Stíl Chicago (17ú heag.)Cullum, Rodney. The English YMCA: Guide To Exercise To Music. Pelham Books, 1988.
Lua MLA (8ú heag.)Cullum, Rodney. The English YMCA: Guide To Exercise To Music. Pelham Books, 1988.
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