Ang, G. P. (1970). Pupils' parents', and teachers' perception of homework as related to certain variables. s.n.].
芝加哥风格引文Ang, Gerarda Pangilinan. Pupils' Parents', and Teachers' Perception of Homework as Related to Certain Variables. [Quezon City: s.n.], 1970.
MLA引文Ang, Gerarda Pangilinan. Pupils' Parents', and Teachers' Perception of Homework as Related to Certain Variables. s.n.], 1970.
警告：这些引文格式不一定是100％准确.