APA (7th ed.) Citation

Khoo, P. S. (1972). Relationships between cognitive development and the learning of science and mathematics.

Chicago Style (17th ed.) Citation

Khoo, Phon Sai. Relationships Between Cognitive Development and the Learning of Science and Mathematics. [Kuala Lumpur], 1972.

MLA (8th ed.) Citation

Khoo, Phon Sai. Relationships Between Cognitive Development and the Learning of Science and Mathematics. 1972.