APA aipamena

Dana, F. C., & Willmarth, E. H. (1937). Engineering problems manual (3d ed.). New York: McGraw-Hill Book Company.

Chicago Style aipamena

Dana, Forest Charles, και Elmer Humphrey Willmarth. Engineering Problems Manual. 3d ed. New York: McGraw-Hill Book Company, 1937.

MLA aipamena

Dana, Forest Charles, και Elmer Humphrey Willmarth. Engineering Problems Manual. 3d ed. New York: McGraw-Hill Book Company, 1937.