This type of source would be
"books of more than one volume"
It appears to be a 4-volume series regarding Southern Rock Opera. We cannot infer that its an anthology, which is a number of collected works within the same genre (such as a 70's rock greatest hits collection), and there are more than one author listed. We also do not know which edition it is.
"Am I allowed to go skating later?" is correct.
Hope this helps! Have an awesome day :)
Explanation:
You didn't give us the text bro! I can't answer it without the text!
It’s either one or three because those to make the most sense