APA (7th ed.) Citation

Hallman, C. N. (1981). Designing Optical Mark Forms for Reference Statistics.

Chicago Style (17th ed.) Citation

Hallman, Clark N. Designing Optical Mark Forms for Reference Statistics. 1981.

MLA (9th ed.) Citation

Hallman, Clark N. Designing Optical Mark Forms for Reference Statistics. 1981.

Warning: These citations may not always be 100% accurate.