APA (7th ed.) Citation

Guptill, A. L. (1922). Sketching and rendering in pencil. Pencil Point Press.

Chicago Style (17th ed.) Citation

Guptill, Arthur L. Sketching and Rendering in Pencil. New York: Pencil Point Press, 1922.

MLA (9th ed.) Citation

Guptill, Arthur L. Sketching and Rendering in Pencil. Pencil Point Press, 1922.

Warning: These citations may not always be 100% accurate.