Dodge, H. Robert
Business Publications, 1973
Buku Teks
McLarney, William J., author
Richard D. Irwin, 1961
Buku Teks
Haynes, W. Warren (William Warren), 1921-1972, author
Prentice-Hall, 1969
Buku Teks
Schuster, Frederick E., author
Reston, 1985
Buku Teks
Kindall, Alva F
Irwin 1964, 1964
Buku Teks