Uma Sekaran
Tata McGraw-Hill, 1995
Buku Teks
[edited by] Leonard A. Schlesinger, Robert G. Eccles, John J. Gabarro ; with the assistance of Thomas B. Lifson, James P. Ware
McGraw-Hill, 1983
Buku Teks
Dodge, H. Robert, author
Business Publications, 1973
Buku Teks
Hempel, George H., author
John Wiley & Sons, 1983
Buku Teks
Saltonstall, Robert, author
McGraw-Hill, 1959
Buku Teks