APA (7th ed.) Citation

Pearl, R. M. (1955). How to know minerals and rocks / by R.M. Pearl. McGraw-Hill.

Chicago Style (17th ed.) Citation

Pearl, R. M. How to Know Minerals and Rocks / by R.M. Pearl. McGraw-Hill, 1955.

MLA (9th ed.) Citation

Pearl, R. M. How to Know Minerals and Rocks / by R.M. Pearl. McGraw-Hill, 1955.

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