APA način citiranja

Spencer, K., & Carpenter, P. (1993). Prenatal screening for Down's syndrome: Authors' reply.

Čikaški stil citiranja

Spencer, K., i P. Carpenter. Prenatal Screening for Down's Syndrome: Authors' Reply. 1993.

MLA način citiranja

Spencer, K., i P. Carpenter. Prenatal Screening for Down's Syndrome: Authors' Reply. 1993.

Upozorenje: Ovi citati možda nisu uvijek 100% točni.