APA (7th ed.) Citation

Sortwell, H. H. (1923). American and English ball clays. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Sortwell, H. H. American and English Ball Clays. [Washington?]: U.S. Government Printing Office, 1923.

MLA (9th ed.) Citation

Sortwell, H. H. American and English Ball Clays. U.S. Government Printing Office, 1923.

Warning: These citations may not always be 100% accurate.