Welsh Joint Education Committee. (1966). General Certificate of Education 1966: Regulations & schedules. Welsh Joint Education Committee.
Citazione stile Chigago Style (17a edizione)Welsh Joint Education Committee. General Certificate of Education 1966: Regulations & Schedules. Cardiff: Welsh Joint Education Committee, 1966.
Citatione MLA (9a ed.)Welsh Joint Education Committee. General Certificate of Education 1966: Regulations & Schedules. Welsh Joint Education Committee, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.