APA (7th ed.) Citation

Busch, W. L., & Voskuil, W. H. (1957). Mineral production in Illinois in 1956. Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Busch, Willis L., and Walter H. Voskuil. Mineral Production in Illinois in 1956. Urbana, IL: Illinois State Geological Survey, 1957.

MLA (9th ed.) Citation

Busch, Willis L., and Walter H. Voskuil. Mineral Production in Illinois in 1956. Illinois State Geological Survey, 1957.