Do the formatting rules of bibliographies drive you up the wall? Do you sigh and question the need for a standard for referencing books? Here's Ottobib, an "ottomatic" bibliography generator at your service.
Ottobib is a handy little browser app that instantly generates your references. Simply type in the ISBN of any book you'd like to reference and Ottobib will automatically change it into one of three formats, MLA, APA, or Chicago/Turabian. That's it, instant references.
Ottobib accepts both ISBN-10 and ISBN-13, and will also spit out a permalink of the results so you don't have to enter the numbers again.