Бүртгэлийн ишлэл

APA-ийн эшлэл(7 дахь хэвлэлт)
Araújo Roberto. (1973). Portugal, the country that has contributed most to geographic knowledge of the globe, in the course of one century she discovered and explored nearly two thirds of the inhabited globe. Secretaria de Estado da Informação e Turismo.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Araújo Roberto. Portugal, the Country That Has Contributed Most to Geographic Knowledge of the Globe, in the Course of One Century She Discovered and Explored Nearly Two Thirds of the Inhabited Globe. Secretaria de Estado da Informação e Turismo, 1973.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Araújo Roberto. Portugal, the Country That Has Contributed Most to Geographic Knowledge of the Globe, in the Course of One Century She Discovered and Explored Nearly Two Thirds of the Inhabited Globe. Secretaria de Estado da Informação e Turismo, 1973.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.