APA (7th ed.) Citation

Rydberg, P. A. (1896). Flora of Black Hills of South Dakota. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Rydberg, Per Axel. Flora of Black Hills of South Dakota. [Washington, D.C.]: U.S. Government Printing Office, 1896.

MLA (9th ed.) Citation

Rydberg, Per Axel. Flora of Black Hills of South Dakota. U.S. Government Printing Office, 1896.