International Symposium Management of Geodetic Data Copenhagen, Geodætisk institut (Denmark), & Tscherning, C. (1981). Proceedings of the International Symposium Management of Geodetic Data København 24.-26. August 1981. Produced for the Geodetic Institute by Akademisk vorlag.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিInternational Symposium Management of Geodetic Data Copenhagen, Geodætisk institut (Denmark), এবং Carl Tscherning. Proceedings of the International Symposium Management of Geodetic Data København 24.-26. August 1981. København, Danmark: Produced for the Geodetic Institute by Akademisk vorlag, 1981.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিInternational Symposium Management of Geodetic Data Copenhagen, et al. Proceedings of the International Symposium Management of Geodetic Data København 24.-26. August 1981. Produced for the Geodetic Institute by Akademisk vorlag, 1981.