APA
Ulin P., . (2002). Qualitative methods. Family Health International, (s.l.): .
Chicago
Ulin Priscilla, . 2002. Qualitative methods. Family Health International, (s.l.): .
Harvard
Ulin P., . (2002). Qualitative methods. Family Health International, (s.l.): .
MLA
Ulin Priscilla, . Qualitative methods. Family Health International, (s.l.): . 2002.