APA引文

Hetzel, M. R., & Clark, T. J. (1980). Comparison of normal and asthmatic circadian rhythms in peak expiratory flow rate.

Citação norma Chicago

Hetzel, M R., and T J. Clark. Comparison of Normal and Asthmatic Circadian Rhythms in Peak Expiratory Flow Rate. 1980.

MLA引文

Hetzel, M R., and T J. Clark. Comparison of Normal and Asthmatic Circadian Rhythms in Peak Expiratory Flow Rate. 1980.

警告：這些引文格式不一定是100％准確.