APA aipamena

Redshaw, M., & Heikkilä, K. (2011). Ethnic differences in women's worries about labour and birth.

Chicago Style aipamena

Redshaw, M., and K. Heikkilä. Ethnic Differences in Women's Worries About Labour and Birth. 2011.

MLA aipamena

Redshaw, M., and K. Heikkilä. Ethnic Differences in Women's Worries About Labour and Birth. 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.