Helsel, Jay D.
Gregg Division, McGraw-Hill, 1979
Buku Teks SO
Boundy, Albert W.
McGraw-Hill, 2012
Buku Teks SO
Jensen, Cecil
McGraw-Hill, 1985
Buku Teks SO
Bishop, Calvin C.
McGraw-Hill, 1952
Buku Teks SO
Boundy, Albert W.
McGraw-Hill, 2012
Buku Teks SO