Seely, Samuel
McGraw-Hill, 1956
Buku Teks SO
edited by Mac E. Van Valkenburg and Wendy M. Midleton
Newnes, 2002
Buku Referensi
Shrader, Robert L.
McGraw-Hill, 1985
Buku Teks
Shrader, Robert L.
Glencoe Macmillan/McGraw-Hill, 1993
Buku Teks
Hellman, Charles I.
Van Nostrand Reinhold, 1956
Buku Teks SO