Phillips, P. (1978). Pre-Columbian shell engravings: From the Craig Mound at Spiro, Oklahoma (Paperback edition.). Peabody Museum Press.
Chicago-Zitierstil (17. Ausg.)Phillips, Philip. Pre-Columbian Shell Engravings: From the Craig Mound at Spiro, Oklahoma. Paperback edition. Cambridge, Mass: Peabody Museum Press, 1978.
MLA-Zitierstil (9. Ausg.)Phillips, Philip. Pre-Columbian Shell Engravings: From the Craig Mound at Spiro, Oklahoma. Paperback edition. Peabody Museum Press, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.