Excelsior Online Writing Lab - Citing in Chicago Style,16th Edition USE THE NAVIGATION PANEL ON THE LEFT.
In addition to tools like those listed above, look for the Cite feature in the databases.
A word of caution! Online tools are excellent but they are not necessarily correct. They read data as it is passed to them, so if the data is incorrect, the citation will be too. You need to understand APA format so you can edit and proof the results of the online products.