Gujarati, Damodar N.
McGraw-Hill, 1992
Buku Teks
Gujarati, Damodar N.
McGraw-Hill , 1978
Buku Teks
Mirer, Thad W.
Macmillan, 1990
Buku Teks
Chiang, Alpha C., 1927-
McGraw-Hill, 1984
Buku Teks
Glaister, Stephen
T.J. Press (Padstow) Ltd., 1982
Buku Teks