Louis Fidge. (2011). Grammar and Punctuation: Pupil Book 3 (Collins Primary Focus) (New edition.). HarperCollins UK.
芝加哥风格引文Louis Fidge. Grammar and Punctuation: Pupil Book 3 (Collins Primary Focus). New edition. HarperCollins UK, 2011.
MLA引文Louis Fidge. Grammar and Punctuation: Pupil Book 3 (Collins Primary Focus). New edition. HarperCollins UK, 2011.
警告：这些引文格式不一定是100％准确.