Mettler, H. (1987). Eureka 1887-1987: Centennial Anniverary Book; The Second Fifty Years. Western Painting Company.
Chicago-referens (17:e uppl.)Mettler, Howard. Eureka 1887-1987: Centennial Anniverary Book; The Second Fifty Years. Aberdeen, South Dakota: Western Painting Company, 1987.
MLA-referens (8:e uppl.)Mettler, Howard. Eureka 1887-1987: Centennial Anniverary Book; The Second Fifty Years. Western Painting Company, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.