Siqueira, T.D.A. e Vieira, R.S. de C. 2013. Demotivation and Leavin Early: a Study in a Population of Adolescent Female Swimming in Manaus. Revista de Psicologia da IMED. 5, 2 (dez. 2013), 121–125. DOI:https://doi.org/10.18256/2175-5027/psico-imed.v5n2p121-125.