Graf, D. (1949). Don Graf's data sheeets: Thousands of simplified facts about building materials, planning, and construction (2nd ed., revised and enlarged.). New York: Reinhold Publishing Corporation.
Παραπομπή Chicago StyleGraf, Don. Don Graf's Data Sheeets: Thousands of Simplified Facts About Building Materials, Planning, and Construction. 2nd ed., revised and enlarged. New York: Reinhold Publishing Corporation, 1949.
Παραπομπή MLAGraf, Don. Don Graf's Data Sheeets: Thousands of Simplified Facts About Building Materials, Planning, and Construction. 2nd ed., revised and enlarged. New York: Reinhold Publishing Corporation, 1949.
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