APA (7th ed.) Citation

Seel, C. (1957). Practical lessons in sheet metal estimating. Heating & Air Conditioning Contractor., 48, 58.

Chicago Style (17th ed.) Citation

Seel, C. "Practical Lessons in Sheet Metal Estimating." Heating & Air Conditioning Contractor. 48 (1957): 58.

MLA (9th ed.) Citation

Seel, C. "Practical Lessons in Sheet Metal Estimating." Heating & Air Conditioning Contractor., vol. 48, 1957, p. 58.

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