Franklin

MLA

Flotow, Friedrich von, and W Friedrich. Martha, Or The Fair At Richmond : Opera In Four Acts. New York: Tretbar, 19.

APA

Flotow, F. von, & Friedrich, W. (19). Martha, or The fair at Richmond : opera in four acts. New York: Tretbar.

Chicago

Flotow, Friedrich von, W. Friedrich, and Friedrich von Flotow. Martha, Or The Fair At Richmond: Opera In Four Acts. New York: Tretbar, 19.