Collier, Abram T., author
Harper & Row, 1962
Buku Teks
Collier, Abram T., author
Harper & Row, 1962
Buku Teks
Eden, Colin, author
Macmillan, 1975
Buku Teks
Cooke, Steve
Prentice-Hall, 1991
Buku Teks
Churchman, Charles West, 1913-, author
Prentice-Hall, 1961
Buku Teks