Olson, K. G. (1987). Why teenagers act the way they do. Group Books.
Lua i Stíl Chicago (17ú heag.)Olson, Keith G. Why Teenagers Act the Way They Do. Colorado: Group Books, 1987.
Lua MLA (9ú heag.)Olson, Keith G. Why Teenagers Act the Way They Do. Group Books, 1987.
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