Burchell, J., & Gould, M. (2020). Cambridge Lower Secondary English Stage 7: Student's Book (1st.). Collins.
芝加哥风格引文Burchell, Julia, 与 Mike Gould. Cambridge Lower Secondary English Stage 7: Student's Book. 1st. UK: Collins, 2020.
MLA引文Burchell, Julia, 与 Mike Gould. Cambridge Lower Secondary English Stage 7: Student's Book. 1st. Collins, 2020.
警告：这些引文格式不一定是100％准确.