Nicholson, P., Gwilt, J., & Lowry, W. (1848). Principles of architecture: Comprising fundamental rules of the art, with their application to practice : also rules for shadows for the five orders (6th ed., rev. and corr.). London: Henry G. Bohn.MLA Citation
Nicholson, Peter, Joseph Gwilt, and Wilson Lowry. Principles of Architecture: Comprising Fundamental Rules of the Art, With Their Application to Practice : Also Rules for Shadows for the Five Orders. 6th ed., rev. and corr. London: Henry G. Bohn, 1848.