Carnahan, Charles Wendell
The C.V. Mosby Company, 1955
Buku Teks
Michael S. Schumann ... [and others]
Van Nostrand Reinhold , 1996
Buku Teks
Player, Macka
West Publishing, 1992
Buku Teks
Fenner, M. Kathleen
D. Van Nostrand Comp., 1980
Buku Teks
Kaplin, William A.
Jossey-Bass Publishers, 1980
Buku Teks