I don't think there is any legal requirement to cite any of it at all.
In most situations, content that you'd cite in your own work probably constitutes fair use. Any citation would be purely for the benefit of your readers and/or to maintain a level of good will or professionalism with the original author.
Of course you may be violating any agreements you've made not to use that material without proper citation, but in such cases the requirements for citation would be specific to the agreements which stipulated them.
Also, this probably works differently for trademarks.
Finally, consider the source. Even if you're in the right, a large publisher can sue you into financial ruin for slighting them.
Practically speaking, if you are at all concerned, you should contact the original author and/or publisher and ask them how they prefer you cite them in your work. They may ask you to agree to some terms or pay some fees or something, in which case it's up to you to decide how to proceed. They may happily respond with their preferences. They may not respond at all. They may say you can't cite them. Etc.
If you are less concerned, simply use any of a variety of standard citation styles. Some popular options are APA, MLA and Chicago. Plug your information in at the citation machine, for instance, and go with that. Just remain consistent.