Cita APA (7th ed.)
Smith, R. M. (1969). Teacher dignosis of educational difficulties. Charles E.Merrill.
Cita Chicago (17th ed.)
Smith, Robert M. Teacher Dignosis of Educational Difficulties. Columbus: Charles E.Merrill, 1969.
Cita MLA (9th ed.)
Smith, Robert M. Teacher Dignosis of Educational Difficulties. Charles E.Merrill, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.