Hussey, David E., author
Pergamon Press, 1973
Buku Teks
Hussey, David E., author
Pergamon Press , 1971
Buku Teks
Ackoff, Russell Lincoln, 1919-, author
Wiley-Interscience, 1970
Buku Teks
Hussey, David E., author
Pergamon Press, 1976
Buku Teks
Jones, Harry, 1911-, author
Gower Press , 1974
Buku Teks