Urquhart, Leonard Church, editor
McGraw-Hill , 1950
Buku Teks
W.F. Chen, editor-in-chief
CRC Press, 2000
Buku Referensi
Vazirani, V.N.
Khana Publishers, 1980
Buku Referensi
Tyler G. Hicks, editor ; S. David Hicks, coordinating editor
McGraw-Hill , 2007
Buku Referensi
Majalah, Jurnal, Buletin