Nersesian, Roy L.
Quorum Books , 1990
Buku Teks
Capezio, Peter J., 1947-, author
McGraw-Hill, 2010
Buku Teks
Hussey, David E., author
Pergamon Press, 1976
Buku Teks
Dauten, Carl Anton, 1913-, author
South-Western Publishing, 1978
Buku Teks
Valentine, Lloyd M., author
South-Western Publishing, 1991
Buku Teks