APA (7th ed.) Citation

Ober Joyce A & U.S. Geological Survey. Materials flow of sulfur.

Chicago Style (17th ed.) Citation

Ober Joyce A and U.S. Geological Survey. Materials Flow of Sulfur.

MLA (9th ed.) Citation

Ober Joyce A and U.S. Geological Survey. Materials Flow of Sulfur.

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