Elsworth, D. H. (200). Motivation in education. New York : Nova Science Publishers.
Lua i Stíl Chicago (17ú heag.)Elsworth, Desmond H. Motivation in Education. New York : Nova Science Publishers, 200.
Lua MLA (9ú heag.)Elsworth, Desmond H. Motivation in Education. New York : Nova Science Publishers, 200.
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