Portugal. Secretariado Nacional para a Informação e Turismo\nOffice of the Secretary of State for Information and Tourism. (2015). Portugal: An informative review. Secretary of State for Information and Tourism.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Portugal. Secretariado Nacional para a Informação e Turismo\nOffice of the Secretary of State for Information and Tourism. Portugal: An Informative Review. Lisboa: Secretary of State for Information and Tourism, 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Portugal. Secretariado Nacional para a Informação e Turismo\nOffice of the Secretary of State for Information and Tourism. Portugal: An Informative Review. Secretary of State for Information and Tourism, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.