APA (7th ed.) Citation

Hernon, P., & McClure, C. R. (1986). Unobtrusive Reference Testing: The 55 Percent Rule.

Chicago Style (17th ed.) Citation

Hernon, Peter, and Charles R. McClure. Unobtrusive Reference Testing: The 55 Percent Rule. 1986.

MLA (9th ed.) Citation

Hernon, Peter, and Charles R. McClure. Unobtrusive Reference Testing: The 55 Percent Rule. 1986.

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