Hudgins, B. B. (1966). Problem solving in the classroom. Mac Millan.
Cita Chicago (17th ed.)Hudgins, Bryce B. Problem Solving in the Classroom. Mac Millan, 1966.
Cita MLA (9th ed.)Hudgins, Bryce B. Problem Solving in the Classroom. Mac Millan, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.