Buchanan, E. J. (1979). The development of operational thinking in elementary school children: An examination of some aspects of Piaget's theory among urban Liberian children. [publisher not identified].
Chicago Style (17th ed.) CitationBuchanan, Elizabeth Joyce. The Development of Operational Thinking in Elementary School Children: An Examination of Some Aspects of Piaget's Theory Among Urban Liberian Children. [Place of publication not identified]: [publisher not identified], 1979.
MLA (9th ed.) CitationBuchanan, Elizabeth Joyce. The Development of Operational Thinking in Elementary School Children: An Examination of Some Aspects of Piaget's Theory Among Urban Liberian Children. [publisher not identified], 1979.
Warning: These citations may not always be 100% accurate.