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Dyfyniad Arddull ChicagoJose, Colin. American Soccer League, 1921-1931: The Golden Years of American Soccer. Lanham, Md. ; London: Scarecrow, 1998.
Dyfyniad MLAJose, Colin. American Soccer League, 1921-1931: The Golden Years of American Soccer. Scarecrow, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.