APA
Geier J., . (2007). Simple computer tune-up. Canada: Wiley Publishing, Inc.
Chicago
Geier Jim, . 2007. Simple computer tune-up. Canada: Wiley Publishing, Inc.
Harvard
Geier J., . (2007). Simple computer tune-up. Canada: Wiley Publishing, Inc.
MLA
Geier Jim, . Simple computer tune-up. Canada: Wiley Publishing, Inc. 2007.
