Gates, Bruce C.
John Wiley & Sons, 1992
Buku Teks SO
Kampen, N.G. van
North-Holland, 1981
Buku Teks SO
Hughes, M.N.
John Wiley & Sons, 1984
Buku Teks
Matar, Sami
Gulf Professional Publ, 2001
Buku Teks SO
Christoffel, Erhard G.
Elsevier , 1989
Buku Teks SO