When writing out names of sources by hand, Carlos should underline the titles of longer works, such as books, plays, or albums. Here are the titles he should underline:
- Of the Meaning of Progress (an essay by W.E.B. Du Bois) - underlined
- Let America Be America Again (a poem by Langston Hughes) - underlined (since poems are generally not underlined, but if following a specific style that requires it, it can be underlined)
- You Showed Me the Way (a song by Ella Fitzgerald) - typically italicized rather than underlined
- Justice and Her Brothers (a book by Virginia Hamilton) - underlined
In summary, he should underline the titles of the essay and the book, while the poem and song titles are typically italicized or put in quotation marks rather than underlined. If he is following a specific style guide, he should refer to that for precise formatting rules.