Rowley, G. S., & Gable, F. K. (1973). An annotated catalog of rare musical items in the Libraries of the University of Iowa: Additions 1963-1972. University of Iowa.
Chicago-referens (17:e uppl.)Rowley, Gordon S., och Frederick Kent Gable. An Annotated Catalog of Rare Musical Items in the Libraries of the University of Iowa: Additions 1963-1972. Iowa City: University of Iowa, 1973.
MLA-referens (8:e uppl.)Rowley, Gordon S., och Frederick Kent Gable. An Annotated Catalog of Rare Musical Items in the Libraries of the University of Iowa: Additions 1963-1972. University of Iowa, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.