Mathematical Association of Victoria. Annual Conference & Costello, G. P. (1978). Aspects of motivation: Mathematical Association of Victoria, Fifteenth Annual Conference, December 7th-8th 1978. The Association.
Chicago-referens (17:e uppl.)Mathematical Association of Victoria. Annual Conference och George P. Costello. Aspects of Motivation: Mathematical Association of Victoria, Fifteenth Annual Conference, December 7th-8th 1978. Parkville: The Association, 1978.
MLA-referens (9:e uppl.)Mathematical Association of Victoria. Annual Conference och George P. Costello. Aspects of Motivation: Mathematical Association of Victoria, Fifteenth Annual Conference, December 7th-8th 1978. The Association, 1978.
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