Metcalf, L., & Eddy, H. P. (1930). Sewerage and sewage disposal: A textbook (2nd ed.). New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleMetcalf, Leonard, and Harrison P. Eddy. Sewerage and Sewage Disposal: A Textbook. 2nd ed. New York: McGraw-Hill Book Company, 1930.
Παραπομπή MLAMetcalf, Leonard, and Harrison P. Eddy. Sewerage and Sewage Disposal: A Textbook. 2nd ed. New York: McGraw-Hill Book Company, 1930.
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