APA-referens (7:e uppl.)

ebrary, Inc, Murray, T. E., & Simon, B. L. (2006). Language variation and change in the American midland: A new look at "heartland" English. John Benjamins Pub..

Chicago-referens (17:e uppl.)

ebrary, Inc, Thomas E. Murray, och Beth Lee Simon. Language Variation and Change in the American Midland: A New Look at "Heartland" English. Amsterdam ; Philadelphia: John Benjamins Pub., 2006.

MLA-referens (9:e uppl.)

ebrary, Inc, et al. Language Variation and Change in the American Midland: A New Look at "Heartland" English. John Benjamins Pub., 2006.