Autor:	Underwood, Jody S., Hoadley, Christopher, Lee, Hollylynne Stohl, Hollebrands, Karen, DiGiano, Chris, Renninger, K. Ann
Zdroj:	Educational Technology Research and Development, 2005 Jan 01. 53(2), 99-112.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/30220431 Zobrazit plný text záznamu