APA (7th ed.) Citation
Williamson, E. G., Cowan, J. L., Crawford, R. G., & Willems, V. (1966). The American student's freedom of expression: A research appraisal. University of Minnesota Press.
Chicago Style (17th ed.) Citation
Williamson, E. G., John L. Cowan, R. George Crawford, and Virginia Willems. The American Student's Freedom of Expression: A Research Appraisal. Minneapolis: University of Minnesota Press, 1966.
MLA (9th ed.) Citation
Williamson, E. G., et al. The American Student's Freedom of Expression: A Research Appraisal. University of Minnesota Press, 1966.
Warning: These citations may not always be 100% accurate.