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Buku Referensi
edited for the Australian Institute of Agricultural Science by R.L. Reid.
Butterworth, 1990
Buku Referensi
Salmon, William A., author
[American Management Association, ], 1999
eBooks
Lewis, Keeta DeStefano, author
Saunders , 2000
Buku Teks
Friedbert Kind-Barkauskas, Architect Bundesverbend, Deutnchens Zementidustrie, Cologne
Birkhauser, 2002
Buku Referensi