Citation Machine is a citation generator that allows users to create citations by filling in information about the source. It supports MLA, APA, Turabian, and Chicago style formatting. Also it has an ISBN look-up that will generate a citation based on a book's ISBN number. CM helps create citations for A LOT of different source types.

OttoBib

- Make a bibliography. It's free, easy and OttoMatic

Ottobib is a fairly simple citation generator that uses the ISBN of a book to create the citation. It supports MLA, APA, and Chicago/Turabian formats. It's perfect for citing books but has no feature to cite electronic sources.

CiteFast is a user-friendly citation generator that supports MLA, APA, and Chicago formatting. Also helps users generate a title page.

KnightCite was created by the Hekman Library of Calvin College as a reliable and efficient means of citing sources for its students. The generator is provided free of charge, and there is an option to create an account so you have more access privileges such as saving citations for later and alphabetizing them. Supports MLA, APA, and Chicago style formatting. Also cites a wide variety of sources including books, anthologies, multimedia, periodicals, communications, and online sources.