Carl E. Seashore (1937). "The Psychology of Music. VI. The Vibrato: (1) What is It?". Music Educators Journal. 23 (4). Sage Publications, Inc. on behalf of MENC: The National Association for Music Education: 30–33. doi:10.2307/3385146. JSTOR3385146. S2CID144013820.
Carl E. Seashore (1937). "The Psychology of Music. VI. The Vibrato: (1) What is It?". Music Educators Journal. 23 (4). Sage Publications, Inc. on behalf of MENC: The National Association for Music Education: 30–33. doi:10.2307/3385146. JSTOR3385146. S2CID144013820.
Carl E. Seashore (1937). "The Psychology of Music. VI. The Vibrato: (1) What is It?". Music Educators Journal. 23 (4). Sage Publications, Inc. on behalf of MENC: The National Association for Music Education: 30–33. doi:10.2307/3385146. JSTOR3385146. S2CID144013820.