Cita APA

Dickey, W., Collins, J. S., Watson, R. G., Sloan, J. M., & Porter, K. G. (1993). Secretor status and Helicobacter pylori infection are independent risk factors for gastroduodenal disease.

Chicago Style Citation

Dickey, W., J S. Collins, R G. Watson, J M. Sloan, i K G. Porter. Secretor Status and Helicobacter Pylori Infection Are Independent Risk Factors for Gastroduodenal Disease. 1993.

Cita MLA

Dickey, W., et al. Secretor Status and Helicobacter Pylori Infection Are Independent Risk Factors for Gastroduodenal Disease. 1993.