Gregory, Robert Henry, author
Chatto and Windus, 1963
Buku Teks
Duncan, F.G., author
Prentice-Hall, 1979
Buku Teks
Duncan, FG., author
Prentice-Hall, 1979
Buku Teks
Pindyck, Robert S., author
Irwin McGraw-Hill, 1997
Buku Teks
Pindyck, Robert S., author
McGraw-Hill, 1991
Buku Teks