APA

Spring H. M., Kohan A. L., . (1981). Boiler operator's guide: boiler construction, operation, inspection, maintenance, and repair, with typical boiler questions and answers for plant, operating, and maintenance engineers. New York: McGraw-Hill Book Co.

Chicago

Spring Harry Mortimer, Kohan Anthony Lawrence, . 1981. Boiler operator's guide: boiler construction, operation, inspection, maintenance, and repair, with typical boiler questions and answers for plant, operating, and maintenance engineers. New York: McGraw-Hill Book Co.

Harvard

Spring H. M., Kohan A. L., . (1981). Boiler operator's guide: boiler construction, operation, inspection, maintenance, and repair, with typical boiler questions and answers for plant, operating, and maintenance engineers. New York: McGraw-Hill Book Co.

MLA

Spring Harry Mortimer, Kohan Anthony Lawrence, . Boiler operator's guide: boiler construction, operation, inspection, maintenance, and repair, with typical boiler questions and answers for plant, operating, and maintenance engineers. New York: McGraw-Hill Book Co. 1981.