What are titles of short poems articles and songs set off by?

Titles of short poems, articles, and songs are typically set off by quotation marks.

Here are some examples:

* Poem: "The Road Not Taken" by Robert Frost

* Article: "The Importance of Sleep" by Dr. Smith

* Song: "Imagine" by John Lennon

Note: Longer works, such as books, magazines, and albums, are usually set off by *italics* instead of quotation marks.