Britton, J., Pavord, I., Wong, C., & Tattersfields, A. (1991). Beta 2-agonists in asthma.
芝加哥风格引文Britton, J., I. Pavord, C. Wong, 与 A. Tattersfields. Beta 2-agonists in Asthma. 1991.
MLA引文Britton, J., et al. Beta 2-agonists in Asthma. 1991.
警告：这些引文格式不一定是100％准确.