What is the standard way to include introduction and references parts to a masters thesis? I have seen that students have two ways to write their thesis,


They have a separate chapter to write an introduction to their thesis. This chapter usually consists of a literature review of their research topic.
They have an introduction section at the beginning of each chapter and they write a separate introduction to each chapter and they don't have any introduction chapter for literature review.


Also, I have seen such behaviour in references part;


some prefer that each chapter having its own references part;
some other prefer all the references come at the end of the thesis report.


Could you please help me know which of these are standard and if any official guide to each exists, I will be happy to know and read them.



EDIT:

Thanks to the answers to this question of mine, I read the writing guide for masters thesis at my university and consulted my question with my advisor, and looked at the previously submitted theses, I wrote the introduction and literature review of my thesis in the very first chapter exactly after printing the abstract of my thesis and brought all the references at the very end just before the final page of my thesis.
You mix up two things: Thesis introduction and Chapter introduction.

From what I observe, every thesis has to have an introduction. It makes sense after all: You need to introduce the topic of the thesis etc. You can't simply start a math thesis by Theorem. For all X ... -- you need to start somewhere, and that's the thesis introduction.

The chapter introduction is a nice thing to do, and there are more options. It can be a short text before the first section, a separate section, some people even provide short (3-or-so-sentence) abstracts to each chapter. However, this is mostly part of your writing style, and it can't be so much enforced (well, it can, but that is IMHO ridiculous).



As for references, there should be guidelines for them. If there's no, then I advise to include full list of references at the very end, since that's what people expect by default, but it's only an advice, not a rule.