Hudgins, B. B. (1966). Problem solving in the classroom. Mac Millan.
Chicago Style aipamenaHudgins, Bryce B. Problem Solving in the Classroom. Mac Millan, 1966.
MLA aipamenaHudgins, Bryce B. Problem Solving in the Classroom. Mac Millan, 1966.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.