Details about how the survey is developed and carried out can be found in the Annual population survey (APS) Quality and Methodoloy Information (Office for National Statistics) report.
Mae manylion am sut mae’r arolwg yn cael ei ddatblygu a’i gynnal ar gael yn adroddiad Gwybodaeth am Ddull ac ansawdd yr Arolwg Blynyddol o’r Boblogaeth (SYG).