Roberts, R. (2011). Celtx: Open source screenwriting : beginner's guide : write and market Hollywood-perfect movie scripts the free way! Packt Pub. Ltd..
Citazione stile Chigago Style (17a edizione)Roberts, Ralph. Celtx: Open Source Screenwriting : Beginner's Guide : Write and Market Hollywood-perfect Movie Scripts the Free Way! Olton, Birmingham: Packt Pub. Ltd., 2011.
Citatione MLA (9a ed.)Roberts, Ralph. Celtx: Open Source Screenwriting : Beginner's Guide : Write and Market Hollywood-perfect Movie Scripts the Free Way! Packt Pub. Ltd., 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.