Gilmer, B. von Haller (Beverly von Haller), 1909-1994, author
McGraw-Hill, 1967
Buku Teks
Biehler, Robert F.
Houghton Miffiln, [date of publication not identified]
Buku Teks
Auerbach Alan J., author
Brown & Benchmark, 1996
Buku Teks
Tiffin, Joseph, author
Prentice-Hall, 1958
Buku Teks
Siegel, Laurence, author
Richard D. Irwin, 1968
Buku Teks