Rogers, George L. (1991). "Effect of Color-Coded Notation on Music Achievement of Elementary Instrumental Students". Journal of Research in Music Education. 39 (1): 64–73. doi:10.2307/3344609. JSTOR3344609. S2CID145542054.
Rogers, George L. (1996). "Effect of Colored Rhythmic Notation on Music-Reading Skills of Elementary Students". Journal of Research in Music Education. 44 (1): 15–25. doi:10.2307/3345410. JSTOR3345410. S2CID145244330.
Rogers, George L. (1991). "Effect of Color-Coded Notation on Music Achievement of Elementary Instrumental Students". Journal of Research in Music Education. 39 (1): 64–73. doi:10.2307/3344609. JSTOR3344609. S2CID145542054.
Rogers, George L. (1996). "Effect of Colored Rhythmic Notation on Music-Reading Skills of Elementary Students". Journal of Research in Music Education. 44 (1): 15–25. doi:10.2307/3345410. JSTOR3345410. S2CID145244330.
Rogers, George L. (1991). "Effect of Color-Coded Notation on Music Achievement of Elementary Instrumental Students". Journal of Research in Music Education. 39 (1): 64–73. doi:10.2307/3344609. JSTOR3344609. S2CID145542054.
Rogers, George L. (1996). "Effect of Colored Rhythmic Notation on Music-Reading Skills of Elementary Students". Journal of Research in Music Education. 44 (1): 15–25. doi:10.2307/3345410. JSTOR3345410. S2CID145244330.