APA (7th ed.) Citation

Hobart, D. E. (1941). Notes and problems in blue print reading of machine drawings. Harper & brothers.

Chicago Style (17th ed.) Citation

Hobart, Dean Estes. Notes and Problems in Blue Print Reading of Machine Drawings. New York, London: Harper & brothers, 1941.

MLA (9th ed.) Citation

Hobart, Dean Estes. Notes and Problems in Blue Print Reading of Machine Drawings. Harper & brothers, 1941.