"Mackerel sky". Weather Online. Retrieved 21 November 2013.
worldcat.org
Donald, Ahrens, C. (2007). Meteorology today : an introduction to weather, climate, and the environment (8th ed.). Belmont, Calif.: Thomson/Brooks/Cole. pp. 298–300. ISBN978-0495011620. OCLC66911677.{{cite book}}: CS1 maint: multiple names: authors list (link)