APA (7th ed.) Citation

Spurr, J. E. Political and commercial geology and the world's mineral resources.

Chicago Style (17th ed.) Citation

Spurr, Josiah Edward. Political and Commercial Geology and the World's Mineral Resources.

MLA (9th ed.) Citation

Spurr, Josiah Edward. Political and Commercial Geology and the World's Mineral Resources.

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