Gaya APA

Abraham, H, J. (Paris : Unesco, 197). Word problems in the classroom a teacher's guide to some United Nations tasks . Paris : Unesco, 1973: Paris : Unesco, 1973.

Gaya MLA

Abraham, Herbert,, J. "Word problems in the classroom a teacher's guide to some United Nations tasks". Paris : Unesco, 1973: Paris : Unesco, 1973, Paris : Unesco, 197. Text.