Citation in Pagan/Metaphysical Texts

OK, I know three of my friends are pagan/metaphysical authors. This is somewhat directed towards them, but I would also like input from those who are not.

What do you think the best style of citation would be for pagan/metaphysical texts? (Intext, footnotes, endnotes? APA, MLA, Chicago?) Why?

Gearing up for some work on my site (including its migration, hopefully) once I get settled in a new place, and some other related side projects, and I've been giving this a bit of thought. At least as of finding this tool, anyway: http://www.ottobib.com