I was curious if anyone could recommend a good text to get a foothold on some the main issues regarding self-reference. I am interested in the mathematical and philosophy of language aspects of self-reference. I appreciate any advice. Thanks.
If you haven't already looked at Thomas Bolander's Stanford Encyclopedia article on Self-Reference, I can certainly recommend it and its excellent bibliography. As a general collection of essays on the problems of Liar phenomena and their strengthenings in language, I would also endorse J. C. Beall's Revenge of the Liar: New essays on the paradox, and I myself am currently reading Raymond Smullyan's Diagonalization and self-reference, which is a technical but awesome book looking at the mathematical issues around fixed points, recursion and incompleteness.
Lucy O'Brien's "Self-Knowing Agents" is a good book about self-reference (more for the phil of lang side). Gareth Evan's work might also be of interest to you, for example "The Varieties of Reference".