Frankel, R. P. (2007). Observing America: The commentary of British visitors to the United States, 1890-1950. University of Wisconsin Press.
Chicago-referens (17:e uppl.)Frankel, Robert Perry. Observing America: The Commentary of British Visitors to the United States, 1890-1950. Madison, Wis.: University of Wisconsin Press, 2007.
MLA-referens (9:e uppl.)Frankel, Robert Perry. Observing America: The Commentary of British Visitors to the United States, 1890-1950. University of Wisconsin Press, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.