Walmsley, J. (1969). Neill and Summerhill, a man and his work: A pictorial study. Penguin Books.
Chicago-Zitierstil (17. Ausg.)Walmsley, John. Neill and Summerhill, a Man and His Work: A Pictorial Study. Harmondsworth: Penguin Books, 1969.
MLA-Zitierstil (9. Ausg.)Walmsley, John. Neill and Summerhill, a Man and His Work: A Pictorial Study. Penguin Books, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.