Hillway, Tyrus, author
Houghton Miffiln, 1964
Buku Teks
Wilson, Bright E., Jr.
Dover Publications, 1990
Buku Teks
Churchman, Charles West, 1913-, author
Wiley, 1957
Buku Teks
Churchman, Charles West, 1913-, author
John Wiley & Sons, 1957
Buku Teks
Churchman, Charles West, 1913-, author
John Wiley & Sons, 1961
Buku Teks