Franzén, C. (1983). Ecology and taxonomy of Silurian crinoids from Gotland. Uppsala Universitet.
Cita Chicago Style (17a ed.)Franzén, Christina. Ecology and Taxonomy of Silurian Crinoids from Gotland. Uppsala, Sweden: Uppsala Universitet, 1983.
Cita MLA (8a ed.)Franzén, Christina. Ecology and Taxonomy of Silurian Crinoids from Gotland. Uppsala Universitet, 1983.
Precaución: Estas citas no son 100% exactas.