APA (7th ed.) Citation

Chen, C. Y., Clark, F. E., & Earl, J. H. (1978). The acquisition of metric system concepts by engineering graphics students. Chen.

Chicago Style (17th ed.) Citation

Chen, Chun Yat, F. E. Clark, and J. H. Earl. The Acquisition of Metric System Concepts by Engineering Graphics Students. [College Station, Tex.]: Chen, 1978.

MLA (9th ed.) Citation

Chen, Chun Yat, et al. The Acquisition of Metric System Concepts by Engineering Graphics Students. Chen, 1978.