Outes-Leon, I., & Dercon, S. (2009). Survey attrition and attrition bias in Young Lives. Young Lives.
Chicago-čujuhus (17. p.)Outes-Leon, I., juo S. Dercon. Survey Attrition and Attrition Bias in Young Lives. Young Lives, 2009.
MLA-čujuhus (9. p.)Outes-Leon, I., juo S. Dercon. Survey Attrition and Attrition Bias in Young Lives. Young Lives, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.