Burk, Marguerite C.
Food and Agriculture Organization of the United Nations, 1980
Buku Teks SO
Sasson, Albert
UNESCO, 1993
Buku Teks
ITC , 1985
Buku Teks SO
Editor by Wei Wei; Sue O'Neill Johnson; Sylvia E.A. Piggott
The Haworth Information Press, 2002
Buku Teks SO
edited by Mario T. Tabucanon and Pakorn Adulbhan
Pergamon, 1981
Buku Teks SO