Aish, F., & Tomlinson, J. (2012). Collins grammar for IELTS. Collins.
芝加哥风格引文Aish, Fiona, 与 Jo Tomlinson. Collins Grammar for IELTS. London: Collins, 2012.
MLA引文Aish, Fiona, 与 Jo Tomlinson. Collins Grammar for IELTS. Collins, 2012.
警告：这些引文格式不一定是100％准确.