Maddala, G.S., author
Macmillan, 1989
Buku Teks
Gujarati, Damodar N., author
McGraw-Hill , 1978
Buku Teks
Gujarati, Damodar N., author
McGraw-Hill , 1988
Buku Teks
Stewart, Jon, author
Hutchinson, 1976
Buku Teks
Tong, Hengqing, author
John Wiley & Sons, 2011
Buku Teks