Collection of Sheet Music,

MLA

Keffer, Edward I., Musical Fund Society of Philadelphia. and Keffer Collection of Sheet Music (University of Pennsylvania). Collection of Sheet Music,. ca. 1790-1895.[Place of publication not identified] : [publisher not identified], [1790-1895?]

APA

Keffer, E., Musical Fund Society of Philadelphia. & Keffer Collection of Sheet Music (University of Pennsylvania). (1790). Collection of Sheet Music,. ca. 1790-1895.[Place of publication not identified] : [publisher not identified].

Chicago

Keffer, Edward I., Musical Fund Society of Philadelphia. and Keffer Collection of Sheet Music (University of Pennsylvania). Collection of Sheet Music,. ca. 1790-1895.[Place of publication not identified] : [publisher not identified], [1790-1895?]