Cita APA (7th ed.)
Copper, P. (2004). Silurian (late Llandovery-Ludlow) atrypid brachiopods from Gotland, Sweden and the Welsh Borderlands, Great Britain. NRC Research Press.
Cita Chicago (17th ed.)
Copper, Paul. Silurian (late Llandovery-Ludlow) Atrypid Brachiopods from Gotland, Sweden and the Welsh Borderlands, Great Britain. Ottawa: NRC Research Press, 2004.
Cita MLA (9th ed.)
Copper, Paul. Silurian (late Llandovery-Ludlow) Atrypid Brachiopods from Gotland, Sweden and the Welsh Borderlands, Great Britain. NRC Research Press, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.