For more on the idea of three eras of survey research, see Groves (2011) and Dillman, Smyth, and Christian (2008) (which breaks up the three eras slightly differently).
ສໍາລັບຂໍ້ມູນເພີ່ມເຕີມກ່ຽວກັບຄວາມຄິດຂອງສາມປີຂອງການສໍາຫຼວດການສໍາຫຼວດ, ເບິ່ງ Groves (2011) ແລະ Dillman, Smyth, and Christian (2008) (ຊຶ່ງແຕກແຍກສາມໄລຍະແຕກຕ່າງກັນເລັກນ້ອຍ).