Conrat, Heinz Fraenkel
Academic Press, 1962
Buku Teks SO
Cooper, J.I.
Chapman and Hall, 1984
Buku Teks SO
by Robert J. Brooker ... [and others]
McGraw-Hill, 2008
Buku Teks
by Eldra Pearl Solomon [and others]
Saunders College, 1993
Buku Teks
Case, James F.
Macmillan, 1979
Buku Teks