SKELA, Janez; BURAZER, Lara. The Architecture of ELT Coursebooks: The Internal Organization of Coursebook Units. Journal for Foreign Languages, Ljubljana, SI, v. 13, n. 1, p. 383–407, 2021. DOI: 10.4312/vestnik.13.383-407. Disponível em: https://journals.uni-lj.si/Vestnik/article/view/10380. Acesso em: 20 mar. 2025.