APA (7th ed.) Citation

Evans, I. O. The observer's book of geology / by I.O. Evans. Warne.

Chicago Style (17th ed.) Citation

Evans, I. O. The Observer's Book of Geology / by I.O. Evans. Warne.

MLA (9th ed.) Citation

Evans, I. O. The Observer's Book of Geology / by I.O. Evans. Warne.

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