Παραπομπή σε μορφή APA (7η εκδ.)

Walliams, D., & Ross, i. T. (2017). As piores crianças do mundo 1. Porto Editora.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Walliams, David, και il. Tony Ross. As Piores Crianças Do Mundo 1. Porto Editora, 2017.

Παραπομπή σε μορφή MLA (8th εκδ.)

Walliams, David, και il. Tony Ross. As Piores Crianças Do Mundo 1. Porto Editora, 2017.