Cita APA (7a ed.)

Graham-Campbell, J., & Williams, G. (2010). SILVER ECONOMY IN THE VIKING AGE. Left Coast Press, Inc..

Cita Chicago Style (17a ed.)

Graham-Campbell, James, y Gareth Williams. SILVER ECONOMY IN THE VIKING AGE. Walnut Creek: Left Coast Press, Inc., 2010.

Cita MLA (8a ed.)

Graham-Campbell, James, y Gareth Williams. SILVER ECONOMY IN THE VIKING AGE. Left Coast Press, Inc., 2010.