Ricker, N. C. (1912). A treatise on design and construction of roofs. J. Wiley & sons; [etc., etc.].
Chicago-viite (17. p.)Ricker, N. Clifford. A Treatise on Design and Construction of Roofs. New York: J. Wiley & sons; [etc., etc.], 1912.
MLA-viite (8. p.)Ricker, N. Clifford. A Treatise on Design and Construction of Roofs. J. Wiley & sons; [etc., etc.], 1912.
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