Volkert R. A. Richard A. & Drake A. A. Avery Ala. (1999). Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands. Washington, United States Government Printing office, 1999.
Chicago-referens (17:e uppl.)Volkert R. A. Richard A. och Drake A. A. Avery Ala. Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands. Washington, United States Government Printing office, 1999, 1999.
MLA-referens (9:e uppl.)Volkert R. A. Richard A. och Drake A. A. Avery Ala. Geochemistry and Stratigraphic Relations of Middle Proterozoic Rocks of the New Jersey Highlands. Washington, United States Government Printing office, 1999, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.