Ayers, Chesley
Specifications for architecture, engineering and construction
McGraw-Hill, 1984
 Buku Teks SO
Marks, R.J. [Raymond John]
Aspects of civil engineering contract procedure
Pergamon Press, 1985
 Buku Teks SO
Marks, R.J. [Raymond John]
Aspects of civil engineering contract procedure
Pergamon Press, 1985
 Buku Teks SO
Ayers, Chesley
Specifications: for architecture, engineering, and construction
McGraw-Hill, 1975
 Buku Teks SO
Ayers, Chesley
Specifications for architecture, engineering and construction
McGraw-Hill, 1984
 Buku Teks SO