Oftedal, I. W., Bergstol, S., & Svinndal, S. (1960). The Larvik-Langesund and the fen areas: Larvikite and nepheline syenite pegmatite minerals, per-alkaline rocks, South Norway : guide to excursions no. A12 and C8. Norwegian Government's Organizing Committee for the International Geological Congress.
Chicago Style (17th ed.) CitationOftedal, Ivar W., Sveinung Bergstol, and Sverre Svinndal. The Larvik-Langesund and the Fen Areas: Larvikite and Nepheline Syenite Pegmatite Minerals, Per-alkaline Rocks, South Norway : Guide to Excursions No. A12 and C8. Oslo: Norwegian Government's Organizing Committee for the International Geological Congress, 1960.
MLA (9th ed.) CitationOftedal, Ivar W., et al. The Larvik-Langesund and the Fen Areas: Larvikite and Nepheline Syenite Pegmatite Minerals, Per-alkaline Rocks, South Norway : Guide to Excursions No. A12 and C8. Norwegian Government's Organizing Committee for the International Geological Congress, 1960.