APA (7th ed.) Citation

Illinois. State Museum of Natural History, Springfield, & Crook, A. R. (1920). Guide to the mineral collections in the Illinois state museum. [publisher not identified].

Chicago Style (17th ed.) Citation

Illinois. State Museum of Natural History, Springfield, and A. R. Crook. Guide to the Mineral Collections in the Illinois State Museum. Springfield, Ill.: [publisher not identified], 1920.

MLA (9th ed.) Citation

Illinois. State Museum of Natural History, Springfield, and A. R. Crook. Guide to the Mineral Collections in the Illinois State Museum. [publisher not identified], 1920.