Pidgeon, D. A. (1967). Achievement in mathematics: A national study of secondary schools. Bucks : National Foundation for Educational Research in England and Wales.
Цитирование в стиле Чикаго (17-е изд.)Pidgeon, Douglas A. Achievement in Mathematics: A National Study of Secondary Schools. Bucks : National Foundation for Educational Research in England and Wales, 1967.
Цитирование MLA (9-е изд.)Pidgeon, Douglas A. Achievement in Mathematics: A National Study of Secondary Schools. Bucks : National Foundation for Educational Research in England and Wales, 1967.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.