Lehman, John W.
Prentice-Hall, 1988
Buku Teks
Newman, Melvin S., author
Macmillan, 1972
Buku Teks
Leffler, John E.
Macmillan, 1973
Buku Teks
Hart, Harold, 1922-, author
Houghton Miffiln, 1991
Buku Teks
Atkins, Robert C. (Robert Charles), 1944-, author
McGraw-Hill, 1990
Buku Teks