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Cita Chicago (17th ed.)International Congress of Photogrammetry, 12th, Ottawa, 1972, International Society for Photogrammetry, i Geoffrey H. Whitcher. Proceedings of the Twelfth International Congress of Photogrammetry: Actes Du Douzieme Congress International De Photogrammetrie. Ottawa: Committee of the Xllth international. Congress of Photogrammetry, 1972.
Cita MLA (9th ed.)International Congress of Photogrammetry, 12th, Ottawa, 1972, et al. Proceedings of the Twelfth International Congress of Photogrammetry: Actes Du Douzieme Congress International De Photogrammetrie. Committee of the Xllth international. Congress of Photogrammetry, 1972.