Lieberman, S. J. (1980). Of Clay Pebbles, Hollow Clay Balls, and Writing: A Sumerian View.
Chicago Style (17th ed.) CitationLieberman, Stephen J. Of Clay Pebbles, Hollow Clay Balls, and Writing: A Sumerian View. 1980.
MLA (8th ed.) CitationLieberman, Stephen J. Of Clay Pebbles, Hollow Clay Balls, and Writing: A Sumerian View. 1980.
Warning: These citations may not always be 100% accurate.