Matz, Adolph
Ohio South-Western Publishing , 1967/1991
Buku Teks
Kharbanda, O.P.
Hampshire Gower Technical Press, 1980
Buku Teks
Hansen, Don R.
South-Western College, 2000
Buku Teks
Dopson, Lea R.
John Wiley & Sons, 2008
Buku Teks
Hansen, Don R.
South-Western College Publishing, 1997
Buku Teks