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Nguyen และผู้แต่งคนอื่นๆ. 2003. Comparative analysis of organic and conventional tea production systems in the north mountainous and mid-hill region, Vietnam. Field of Study Agricultural Systems, Chiang Mai University;
Nguyen และผู้แต่งคนอื่นๆ. (2003) Comparative analysis of organic and conventional tea production systems in the north mountainous and mid-hill region, Vietnam . Chiang Mai University/Chiang Mai.
Nguyen และผู้แต่งคนอื่นๆ. Comparative analysis of organic and conventional tea production systems in the north mountainous and mid-hill region, Vietnam. . Chiang Mai:Chiang Mai University, 2003.
Nguyen และผู้แต่งคนอื่นๆ. (2003) Comparative analysis of organic and conventional tea production systems in the north mountainous and mid-hill region, Vietnam . Chiang Mai University/Chiang Mai.