Add a citation to the student's essay, if necessary. The original passage is below.

A Trip to Sesame Street
— a book by Angelica Martinez, chapter 3, page 153.

Some of the Sesame Street characters' costumes were revised after initial screenings. A frightening and awkward first version of Mr. Snuffleupagus, for instance, did not appeal to early viewers.
Part of a student's essay:

Mr. Snuffleupagus’s initial costume struck viewers as being "frightening and awkward" and was therefore altered shortly after the character made his debut ​.

(Martinez, 153)

To add a citation to the student's essay, you can include the source information at the end of the sentence. Here is an example of how you can incorporate the citation:

According to Angelica Martinez in her book, "A Trip to Sesame Street," the initial costume of Mr. Snuffleupagus was considered "frightening and awkward" and was subsequently revised shortly after the character's debut (Martinez, chapter 3, p. 153).

To add a citation to the student's essay, you need to provide the necessary information in a recognized citation style. In this case, the original passage is from a book called "A Trip to Sesame Street" by Angelica Martinez, specifically from chapter 3, page 153. Here's how you can add the citation to the student's essay:

According to Angelica Martinez's book "A Trip to Sesame Street" (chapter 3, page 153), Mr. Snuffleupagus's initial costume struck viewers as being "frightening and awkward" and was therefore altered shortly after the character made his debut.