Citazione APA

Ricker, N. C. (1912). A treatise on design and construction of roofs. J. Wiley & sons; [etc., etc.].

Stile di citazione Chicago

Ricker, N. Clifford. A Treatise on Design and Construction of Roofs. New York: J. Wiley & sons; [etc., etc.], 1912.

Citazione MLA

Ricker, N. Clifford. A Treatise on Design and Construction of Roofs. J. Wiley & sons; [etc., etc.], 1912.