There's a difference between filming a script and making a movie.
Stephen Chbosky - Wikipedia
THE PERKS OF BEING A WALLFLOWER Interview - Stephen Chbosky
The Perks of Being a Wallflower - Wikipedia
Interview: Writer/ Director Stephen Chbosky On 'The Perks Of Being A Wallflower
The Perks of Being a Wallflower by Stephen Chbosky
The Perks of Being a Wallflower - Film Analysis
THE PERKS OF BEING A WALLFLOWER Blu-ray Review
THE PERKS OF BEING A WALLFLOWER - Interview with Stephen Chbosky (Writer/ Director)
Emma Watson and Stephen Chbosky THE PERKS OF BEING A WALLFLOWER Interview
I'm author, screenwriter and director Stephen Chbosky best known for writing The Perks of Being A Wallflower, and I'm here to answer all of your questions on Perks and my new book
Review of The Perks Of Being A Wallflower - Misfit Story Brought To The Big Screen