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

Healthy You
— a book by Jillian Martin, chapter 4, page 56.

Focus on eating more dark green, leafy vegetables, like spinach and kale. These foods contain lots of iron and fiber, which are important for a healthy diet.

Part of a student's essay:
Martin advocates eating “dark green, leafy vegetables” because of the nutrients these foods provide ​

(Martin, chapter 4, p. 56)

To add a citation to the student's essay based on the original passage, you can use the following format:

"Martin advocates eating 'dark green, leafy vegetables' because of the nutrients these foods provide" (Martin, chapter 4, p. 56).

Make sure to include the author's last name (Martin), the book title (Healthy You), the specific chapter being referenced (chapter 4), and the page number (p. 56) where the information can be found.

To add a citation to the student's essay, you can follow the APA or MLA citation style, depending on the requirements of the assignment or paper. Here's how you can add a citation for the book "Healthy You" by Jillian Martin:

APA Style:
According to Martin (Year), dark green, leafy vegetables should be incorporated into the diet due to their high iron and fiber content (Martin, Year, p. 56).

MLA Style:
Martin suggests including dark green, leafy vegetables in one's diet due to their richness in iron and fiber (Martin 56).

Please note that in the above examples, "Year" refers to the publication year of the book. If the year is not mentioned or available, you can omit it from the citation.

Remember to replace "Year" with the actual publication year of the book, and "56" with the appropriate page number where the information can be found in the book.