31 Studies : for viola solo

MLA

Fiorillo, Federigo, and Louis Pagels. 31 Studies : for Viola Solo. New York: International Music Company, 1948.

APA

Fiorillo, F., & Pagels, L. (1948). 31 Studies : for viola solo. New York: International Music Company.

Chicago

Fiorillo, Federigo, and Louis Pagels. 31 Studies: For Viola Solo. New York: International Music Company, 1948.