Speden, I. G. (1967). Revision of Syncyclonema (upper cretaceous) and comparison with other small pectinid Bivalves and Entolium. Peabody Museum of Natural History.
Chicago-Zitierstil (17. Ausg.)Speden, Ian G. Revision of Syncyclonema (upper Cretaceous) and Comparison with Other Small Pectinid Bivalves and Entolium. New Haven, Conn: Peabody Museum of Natural History, 1967.
MLA-Zitierstil (9. Ausg.)Speden, Ian G. Revision of Syncyclonema (upper Cretaceous) and Comparison with Other Small Pectinid Bivalves and Entolium. Peabody Museum of Natural History, 1967.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.