Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1951). Geographical bulletin. Department of Mines and Technical Surveys, Geographical Branch.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Geographical Bulletin. Ottawa: Department of Mines and Technical Surveys, Geographical Branch, 1951.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Geographical Bulletin. Department of Mines and Technical Surveys, Geographical Branch, 1951.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.