Willis, H. P., & Byers, J. R. B. (1924). Portland cement prices, their basis, character, and present position. Ronald press.
Citace podle Chicago (17th ed.)Willis, Henry Parker, a John R. B. Byers. Portland Cement Prices, Their Basis, Character, and Present Position. New York: Ronald press, 1924.
Citace podle MLA (9th ed.)Willis, Henry Parker, a John R. B. Byers. Portland Cement Prices, Their Basis, Character, and Present Position. Ronald press, 1924.
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