Burk, Marguerite C.
Food and Agriculture Organization of the United Nations, 1980
Buku Teks
ITC , 1985
Buku Teks
by Ray A. Goldberg ... [and others]
Balinger, 1974
Buku Teks
Claessens, Stijn
D.C. The World Bank , 1993
Buku Teks
Editor by Wei Wei; Sue O'Neill Johnson; Sylvia E.A. Piggott
The Haworth Information Press, 2002
Buku Teks