Phillips, S. W. (2002). The US Geological Survey and the Chesapeake Bay. US Geological Survey circular 1220.
Style de citation ChicagoPhillips, Scott W. "The US Geological Survey and the Chesapeake Bay." US Geological Survey Circular 1220 2002.
Style de citation MLAPhillips, Scott W. "The US Geological Survey and the Chesapeake Bay." US Geological Survey Circular 1220 2002.
Attention : ces citations peuvent ne pas être correctes à 100%.