Dennen, W. H. (1943). A nickel deposit near Dracut, Massachusetts.
Cita Chicago Style (17a ed.)Dennen, William H. A Nickel Deposit Near Dracut, Massachusetts. 1943.
Cita MLA (8a ed.)Dennen, William H. A Nickel Deposit Near Dracut, Massachusetts. 1943.
Precaución: Estas citas no son 100% exactas.