Should I justify the organization of chapters and sections in the research paper? I am using a research handbook written by Creswell to guide me in writing my Bachelor's Thesis.

Specifically, I followed his research design model.

Should I justify why I structured my Methods Chapter the way I did by saying that such structure was recommended by Creswell?

For example, I may say that Creswell suggested that this section should be included in the research design. 

I live in a developing country. My institution has no specific style guide.
They underestimate undergraduate research, but I cannot wait for my supervisor to tell me what to do as long as my sources are authoritative.

Here is a link of a summary of the book.

I cannot consult my supervisor at the moment nor wait or state why here.

Thank you
If I take your question correctly, it sounds as if you don't know whether to refer to the styleguide that informed you to structure your thesis in a certain way. So, in your introduction, you have a section such as:


  The next chapter of this thesis describes the background literature. Chapter 3 outlines the methodology and so on. Chapter 4 presents the experimental design, whatever … Finally, chapter 7 concludes and provides further possibilities for research. This structure is suggested by Cresswell (19xx)


If that's what you're thinking, then I would say no; don't reference the styleguide that you based your thesis structure on. Just like you wouldn't cite, for instance, the AP styleguide for your spelling conventions.