APA-referens (7:e uppl.)
Wharton, M. E. (1991). Bluegrass land & life: Land character, plants, and animals of the Inner Bluegrass region of Kentucky, past, present, and future. The University Press of Kentucky.
Chicago-referens (17:e uppl.)
Wharton, Mary E. Bluegrass Land & Life: Land Character, Plants, and Animals of the Inner Bluegrass Region of Kentucky, Past, Present, and Future. Lexington, Kentucky: The University Press of Kentucky, 1991.
MLA-referens (9:e uppl.)
Wharton, Mary E. Bluegrass Land & Life: Land Character, Plants, and Animals of the Inner Bluegrass Region of Kentucky, Past, Present, and Future. The University Press of Kentucky, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.