MLA

Gunn, John. The Theory and Practice of Fingering the Violoncello. London: Gunn, 1800.

APA

Gunn, J. (1800). The Theory and Practice of Fingering the Violoncello. London: Gunn.

Chicago

Gunn, John The Theory and Practice of Fingering the Violoncello. London: Gunn, 1800.