Barron, Randall F.
McGraw-Hill, 1966
Buku Teks
Gerber, Scott Douglas
New York University press, 1999
Buku Teks
Ravitz, Abe C.
Press of Western Reserve University, 1962
Buku Teks SO
Dunham, Clarence W.
McGraw-Hill, 1962
Buku Teks
Rowe, Clarence J.
W. C. Brown Co, 1975
Buku Teks SO