North Western Secondary School Examinations Board. (1966). Regulations and syllabuses for the Certificate of Secondary Education: 1966. North Western Secondary School Examinations Board.
Citazione stile Chigago Style (17a edizione)North Western Secondary School Examinations Board. Regulations and Syllabuses for the Certificate of Secondary Education: 1966. Manchester: North Western Secondary School Examinations Board, 1966.
Citatione MLA (9a ed.)North Western Secondary School Examinations Board. Regulations and Syllabuses for the Certificate of Secondary Education: 1966. North Western Secondary School Examinations Board, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.