APA citiranje

Armstrong, B. G., McDonald, A. D., & Sloan, M. (1992). Cigarette, alcohol, and coffee consumption and spontaneous abortion.

Citação norma Chicago

Armstrong, B G., A D. McDonald, and M. Sloan. Cigarette, Alcohol, and Coffee Consumption and Spontaneous Abortion. 1992.

MLA citiranje

Armstrong, B G., A D. McDonald, and M. Sloan. Cigarette, Alcohol, and Coffee Consumption and Spontaneous Abortion. 1992.