Howard-Williams, D., Tomalin, M., & Watcyn-Jones, P. Instant lessons 1. Elementary.
芝加哥风格引文Howard-Williams, Deirdre, Mary Tomalin, 与 Peter Watcyn-Jones. Instant Lessons 1. Elementary.
MLA引文Howard-Williams, Deirdre, et al. Instant Lessons 1. Elementary.
警告：这些引文格式不一定是100％准确.