edited by Burton V. Dean
John Wiley & Sons, 1963
Buku Teks
Roberts, Edward B.
Harper & Row, 1964
Buku Teks
McLeod, T.S.
Gower Press, 1971
Buku Teks
Churchman, Charles West, 1913-
Wiley, 1957
Buku Teks
Churchman, Charles West, 1913-
John Wiley & Sons, 1957
Buku Teks