APA (7th ed.) Citation

Ligon, G., Stewart, B., & Wilkinson, D. R. M. (1990). Problems in calculating and comparing dropout rates. Educational Research Service.

Chicago Style (17th ed.) Citation

Ligon, Glynn, Bridget Stewart, and D. R. M. Wilkinson. Problems in Calculating and Comparing Dropout Rates. Arlington, Va.: Educational Research Service, 1990.

MLA (9th ed.) Citation

Ligon, Glynn, et al. Problems in Calculating and Comparing Dropout Rates. Educational Research Service, 1990.