Combination of some type of designs or styles is a pattern
Some domains such as .com, .org, and .net can be purchased and used by any individual. However, the domain .edu is reserved for colleges and universities, while .gov denotes a government website. These two are usually credible sources for information (though occasionally a university will assign a .edu address to each of its students for personal use, in which case use caution when citing). Be careful with the domain .org, because .org is usually used by non-profit organizations which may have an agenda different than educating.
it is ALWAYS important to cites ALL of your sourses to avoid plagiarism. I normally at the end of my paper make a new paragraph and title it "Works Cited". type citation machine into google for more help writing a fromal citation. Remember most junior and high schools only allow certan citation styles but your best bet is either APA or MLA. hope this helped.