Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Potion:

"

In the Harry Potter series, potions also play a main role.[citation needed] The students are required to attend potion classes, taught by Severus Snape and Horace Slughorn and knowledge of potions often becomes a factor for many of the characters. Throughout the course of the story, several characters take Polyjuice Potion to impersonate other characters, while the use of Felix Felicis potion in Book 6 helps Harry Potter gain vital information about horcruxes.