APA (7th ed.) Citation

Gluskoter, H. J., & Simon, J. A. (1968). Sulfur in Illinois coals. Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Gluskoter, Harold J., and Jack Aaron Simon. Sulfur in Illinois Coals. Urbana: Illinois State Geological Survey, 1968.

MLA (9th ed.) Citation

Gluskoter, Harold J., and Jack Aaron Simon. Sulfur in Illinois Coals. Illinois State Geological Survey, 1968.