Quinn, Virginia Nichols, author
McGraw-Hill, 1995
Buku Teks
Gilmer, B. von Haller (Beverly von Haller), 1909-1994, author
McGraw-Hill, 1966
Buku Teks
edited by Cary L. Cooper, Ivan T. Robertson
John Wiley & Sons, 1990
Buku Teks
edited by Cary L. Cooper, Ivan T. Robertson
John Wiley & Sons, 2000
Buku Teks
edited by Fred McKinney
Macmillan, 1967
Buku Teks