Trowbridge, B. J. (1983). Olfactory communication in the European otter (Lutra L. lutra).
Lua i Stíl Chicago (17ú heag.)Trowbridge, Beverley Jane. Olfactory Communication in the European Otter (Lutra L. Lutra). 1983.
Lua MLA (8ú heag.)Trowbridge, Beverley Jane. Olfactory Communication in the European Otter (Lutra L. Lutra). 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.