Romantic poetry is characterized by the "spontaneous overflow of powerful feelings" (Wordsworth 263). Author and Page. Note that no comma is used in MLA between the author and the page number.
Wordsworth stated that Romantic poetry was marked by a "spontaneous overflow of powerful feelings" (263). Page only because author was already mentioned in the sentence.
Wordsworth extensively explored the role of emotion in the creative process (263). Page only because author was already mentioned in the sentence. Note that an in-text citation has to be used even though this is a paraphrase and not an exact quote.
Your Works Cited entry for all these in-text citations would look like this:
Wordsworth, William. Lyrical Ballads. London: Oxford U.P., 1967. Print.
For more information, go to the In-Text Citations Page of the Purdue Online Writing Laboratory (OWL).