Levring, T. (1981). Proceedings of the Tenth International Seaweed Symposium. Goteborg, Sweden, August 11-15, 1980. Walter de Gruyter.
Chicago-viite (17. p.)Levring, T. Proceedings of the Tenth International Seaweed Symposium. Goteborg, Sweden, August 11-15, 1980. Berlin, West Germany: Walter de Gruyter, 1981.
MLA-viite (9. p.)Levring, T. Proceedings of the Tenth International Seaweed Symposium. Goteborg, Sweden, August 11-15, 1980. Walter de Gruyter, 1981.
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