Villarreal, Dan (1 december 2016). ”Do I Sound Like a Valley Girl To You? Perceptual Dialectology and Language Attitudes in California” (på engelska). Publication of the American Dialect Society 101: sid. 57. doi:10.1215/00031283-3772901. ISSN0002-8207. Läst 1 november 2022.
Villarreal, Dan (1 december 2016). ”Do I Sound Like a Valley Girl To You? Perceptual Dialectology and Language Attitudes in California” (på engelska). Publication of the American Dialect Society 101: sid. 57. doi:10.1215/00031283-3772901. ISSN0002-8207. Läst 1 november 2022.