Mitchell, Robert L.
Engineering economics
John Wiley & Sons, 1980
 Buku Teks SO
Riggs, James L.
Engineering economics
McGraw-Hill, 1982
 Buku Teks SO
Spencer, Milton H.
Contemporary economics
Worth, 1971
 Buku Teks SO
A survey of contemporary economics
edited by Howard S. Elllis
Blakiston, 1949
 Buku Teks
McEachern, William A.
Economics a contemporary introduction
South-Western College Publishing, 1988
 Buku Teks