Baker, A.L.L.
Cement and Concrete Association, 1970
Buku Teks
Funderbank, Charles
Brooks/Cole Publishing, 1982
Buku Teks
Thane, Pat
Longman, 1982
Buku Teks
edited by R. Michael Feener, David Kloos, Annemarie Samuels
Brill, 2016
eBooks
Cressey, George Babcock, 1896-1963
McGraw-Hill, 1934
Buku Teks SO