Citação norma APA

Owen, L., McNeill, A., & Callum, C. (1998). Trends in smoking during pregnancy in England, 1992-7: Quota sampling surveys. British Medical Journal.

Citação norma Chicago

Owen, Lesley, Ann McNeill, and Christine Callum. Trends in Smoking During Pregnancy in England, 1992-7: Quota Sampling Surveys. British Medical Journal, 1998.

Citação norma MLA

Owen, Lesley, Ann McNeill, and Christine Callum. Trends in Smoking During Pregnancy in England, 1992-7: Quota Sampling Surveys. British Medical Journal, 1998.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.