Webb, W. F. (1948). Foreign land and freshwater shells: From all parts of the world except the United states and Canada. St. Petersburg Printing.
Chicago-Zitierstil (17. Ausg.)Webb, Walter Freeman. Foreign Land and Freshwater Shells: From All Parts of the World Except the United States and Canada. Florida: St. Petersburg Printing, 1948.
MLA-Zitierstil (9. Ausg.)Webb, Walter Freeman. Foreign Land and Freshwater Shells: From All Parts of the World Except the United States and Canada. St. Petersburg Printing, 1948.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.