Guptill, A. L. (1936). Sketching as a hobby. Harper & brothers.
Chicago Style (17th ed.) CitationGuptill, Arthur L. Sketching as a Hobby. New York London: Harper & brothers, 1936.
MLA (9th ed.) CitationGuptill, Arthur L. Sketching as a Hobby. Harper & brothers, 1936.
Warning: These citations may not always be 100% accurate.