Veera Vorapitirangsree และผู้แต่งคนอื่นๆ. (2013) Production System Trial of London Low Canopy Pruning Orchard in Chiang Rai Province. <i>Thai Agricultural Research Journal</i>, <i>31</i>(1), 69-77.Veera Vorapitirangsree และผู้แต่งคนอื่นๆ. "Production System Trial of London Low Canopy Pruning Orchard in Chiang Rai Province". Thai Agricultural Research Journal 31 (2013):69-77.Veera Vorapitirangsree และผู้แต่งคนอื่นๆ. Production System Trial of London Low Canopy Pruning Orchard in Chiang Rai Province. Department of Agriculture:ม.ป.ท. 2013.