APA citiranje

Gotley, D. C., Morgan, A. P., Ball, D., Owen, R. W., & Cooper, M. J. (1991). Composition of gastro-oesophageal refluxate.

Citação norma Chicago

Gotley, D C., A P. Morgan, D. Ball, R W. Owen, and M J. Cooper. Composition of Gastro-oesophageal Refluxate. 1991.

MLA citiranje

Gotley, D C., et al. Composition of Gastro-oesophageal Refluxate. 1991.