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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPortugal. 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.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিPortugal. 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.
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