APA (7th ed.) Citation

Ryan, D. P. (1999). The complete idiot's guide to lost civilizations. Alpha Books.

Chicago Style (17th ed.) Citation

Ryan, Donald P. The Complete Idiot's Guide to Lost Civilizations. New York: Alpha Books, 1999.

MLA (9th ed.) Citation

Ryan, Donald P. The Complete Idiot's Guide to Lost Civilizations. Alpha Books, 1999.

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