Lindström, G. (1890). The Ascoceratidae and the Lituitidae of the Upper Silurian formation of Gotland. P.A. Norstedt & Söner.
Chicago Style aipamenaLindström, G. The Ascoceratidae and the Lituitidae of the Upper Silurian Formation of Gotland. Stockholm: P.A. Norstedt & Söner, 1890.
MLA aipamenaLindström, G. The Ascoceratidae and the Lituitidae of the Upper Silurian Formation of Gotland. P.A. Norstedt & Söner, 1890.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.