@article {631,
	title = {An ethological approach to personality development.},
	journal = {American Psychologist},
	volume = {46},
	year = {1991},
	month = {Jan-01-1991},
	pages = {333 - 341},
	issn = {0003-066X},
	doi = {10.1037//0003-066X.46.4.333},
	url = {http://doi.apa.org/getdoi.cfm?doi=10.1037/0003-066X.46.4.333},
	author = {Ainsworth, Mary S. and Bowlby, John}
}
