Glautier, M.W.E., author
Pitman, 1990
Buku Teks
Spiller, Earl A., author
Homewood, Illinois , Richard D. Irwin
Buku Teks
Robert F. Meigs ... [and others]
McGraw-Hill, 1996
Buku Teks
Slavin, Albert, author
Holt Rinehart and Winston, 1972
Buku Teks
Murphy, Mary E., author
Richard D. Irwin, 1966
Buku Teks