Casady, Mona J. author
South-Western Publishing, 1985
Buku Teks
Stern, Robert A., author
John Wiley, 1973
Buku Teks
O`Brien, James A., 1936-, author
Richard D. Irwin, 1986
Buku Teks
Gildersleeve, Thomas R., author
Prentice-Hall, 1978
Buku Teks
Clark, Frank J., author
Prentice-Hall, 1972
Buku Teks