APA (7th ed.) Citation

Howel Williams, F. T. (1954). Petrography. WH Freeman.

Chicago Style (17th ed.) Citation

Howel Williams, FJ Tunner. Petrography. WH Freeman, 1954.

MLA (8th ed.) Citation

Howel Williams, FJ Tunner. Petrography. WH Freeman, 1954.

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