Using signal or lead-in phrases is an excellent way to give your reader the necessary context to understand why you think the quotation is important to your discussion:
A signal phrase usually names the author of the source, gives the publication year in parentheses, and often provides some context. It commonly appears before the source material. To vary your sentence structure, you may decide to interrupt source material with a signal phrase or place the signal phrase after your paraphrase, summary, or direct quotation (A Canadian Writer's Reference (5th ed.), Hacker & Sommers, p. 453)
Example: Gore (1992) asserted the importance of considering the environmental effects of technological advances and noted that, “the appropriateness of a technology becomes increasingly important as its power grows and its potential for destroying the environment expands” (p. 146).
Verbs in signal phrases
Use active and descriptive verbs in your introduction of a quotation:
(Source: A Canadian Writer's Reference (5th ed.), Hacker & Sommers, p. 454)
No matter how you choose to incorporate the idea into your text, you want to make it clear that you are referring to someone else’s idea, not claiming it as your own.