song title grammar in a story

[Nosepicker]

I'm writing a Children's story. The sentence is as follows: Grace, who had
just turned seven, was humming, somewhere over the rainbow, as she strolled
through her backyard.

Question is: should the title be capitalized, Quotation marks, or just as is?

 

[Suzanne S. Barnhill]

Grace, who had just turned seven, was humming "Somewhere over the Rainbow"
as she strolled through her backyard.

--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
http://word.mvps.org

 

[Peter T. Daniels]

Not a question about Microsoft Word.

 

[Peter T. Daniels]

See that's why we don't answer questions like this -- the _title_ of
the song is "Over the Rainbow," and if Grace was humming, she wasn't
humming any words at all.