(1970). Nuffield Foundation. Mathematics Teaching Project: Checking Up. W&R Chambers.
芝加哥风格引文Nuffield Foundation. Mathematics Teaching Project: Checking Up. Edinburgh: W&R Chambers, 1970.
MLA引文Nuffield Foundation. Mathematics Teaching Project: Checking Up. W&R Chambers, 1970.
警告：这些引文格式不一定是100％准确.