Humphreys, G. (1976). English grammer. Hodder & Stoughton.
芝加哥风格引文Humphreys, Gordon. English Grammer. London: Hodder & Stoughton, 1976.
MLA引文Humphreys, Gordon. English Grammer. Hodder & Stoughton, 1976.
警告：这些引文格式不一定是100％准确.
APA引文