Witkowski, A. (1979). A taxonomic study on fresh-water sculpins of genus Cottus Linnaeus, 1758 (Cottus gobio L. and Cottus poecilopus Heck.) in Poland. Wydawn. Uniwersytetu Wrocławskiego.
Citação do estilo Chicago (17ª ed.)Witkowski, Andrzej. A Taxonomic Study on Fresh-water Sculpins of Genus Cottus Linnaeus, 1758 (Cottus Gobio L. and Cottus Poecilopus Heck.) in Poland. Wrocław: Wydawn. Uniwersytetu Wrocławskiego, 1979.
Citação MLA (8ª ed.)Witkowski, Andrzej. A Taxonomic Study on Fresh-water Sculpins of Genus Cottus Linnaeus, 1758 (Cottus Gobio L. and Cottus Poecilopus Heck.) in Poland. Wydawn. Uniwersytetu Wrocławskiego, 1979.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.