Østrem, E. (2001). The Office of Saint Olav: A study in chant transmission. Uppsala University Library.
Čikaški stil citiranja (17. izdanje)Østrem, Eyolf. The Office of Saint Olav: A Study in Chant Transmission. Uppsala: Uppsala University Library, 2001.
MLA način citiranja (8. izdanje)Østrem, Eyolf. The Office of Saint Olav: A Study in Chant Transmission. Uppsala University Library, 2001.
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