@book{85559,
	author = {Howitt, Dennis and Cramer, Duncan and Seminario Nacional Avaliação Global do Ensino Superior, 1, Lisboa, 2000 and Conselho Nacional avaliação Ensino Superior},
	title = {Introduction to research methods in psychology},
	publisher = {Pearson},
	year = {2005},
	address = {Harlow},
	edition = {4th ed}
}