On using sources
The Miami University gives pointers for acknowledging sources in business documents, especially those that present proposals:
a) Readers should be able to identify sources. State full URLs, names of websites, and authors’ names using a consistent citation method.
b) Avoid using direct quotes and instead paraphrase them or state them in your own words. This will also give the impression that you have a solid grasp of the evidence for your proposals.
c) Provide explanation for outside materials so readers will not come up with an interpretation that is different from yours.
d) Use only persuasive and credible sources. This will make your document more reliable and convincing.