Use the phrase "Declaro que o presente trabalho é de minha autoria" .
Clearly list any parts that are not yours (e.g., quotes, base templates, or music). Г‰ de Minha Autoria
In Portuguese-speaking academic institutions (like those in Brazil or Portugal), you are often required to include a (Declaration of Authorship) in your thesis or final project (TCC). Use the phrase "Declaro que o presente trabalho
Name the specific piece of work (title, file name, or project). Г‰ de Minha Autoria