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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPortuguese Meeting on Astronomy and Astrophysics Lisbon, Portugal, Centro multidisciplinar de astrofísica (Portugal), Inc ebrary, এবং José P. S. Lemos. Astronomy and Astrophysics: Recent Developments : Proceedings of the 10th Portuguese Meeting : CENTRA, Lisbon, Portugal, 27-28 July 2000. River Edge, NJ: World Scientific, 2001.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিPortuguese Meeting on Astronomy and Astrophysics Lisbon, Portugal, et al. Astronomy and Astrophysics: Recent Developments : Proceedings of the 10th Portuguese Meeting : CENTRA, Lisbon, Portugal, 27-28 July 2000. World Scientific, 2001.