Bell, P. (1970). Basic teaching for slow learners. Muller.
Cita Chicago (17th ed.)Bell, Peter. Basic Teaching for Slow Learners. London: Muller, 1970.
Cita MLA (8th ed.)Bell, Peter. Basic Teaching for Slow Learners. Muller, 1970.
Atenció: Aquestes cites poden no estar 100% correctes.