Sutohn Suwanbutr และ Anek Bangkha; Pinit Khewphumpung; Weeravit Vitayarug. (1997) Study on the Severity of Damage by Sap Sucking Pests to Different Off-Season Sweet Pepper Varieties. <i>Thai Agricultural Research Journal</i>, <i>15</i>(3), 205-211.Sutohn Suwanbutr และ Anek Bangkha; Pinit Khewphumpung; Weeravit Vitayarug. "Study on the Severity of Damage by Sap Sucking Pests to Different Off-Season Sweet Pepper Varieties". Thai Agricultural Research Journal 15 (1997):205-211.Sutohn Suwanbutr และ Anek Bangkha; Pinit Khewphumpung; Weeravit Vitayarug. Study on the Severity of Damage by Sap Sucking Pests to Different Off-Season Sweet Pepper Varieties. Department of Agriculture:ม.ป.ท. 1997.