Fowler, W. S., Pidcock, J., & Yorkey, R. C. Incentive themes. Book 4, teacher´s edition.
芝加哥风格引文Fowler, W. S., J. Pidcock, 与 Richard C. Yorkey. Incentive Themes. Book 4, Teacher´s Edition.
MLA引文Fowler, W. S., et al. Incentive Themes. Book 4, Teacher´s Edition.
警告：这些引文格式不一定是100％准确.