Washington (State) University. Bureau of Governmental Research and Services. Report. s.n.
Cita Chicago (17th ed.)Washington (State) University. Bureau of Governmental Research and Services. Report. Seattle: s.n.
Cita MLA (9th ed.)Washington (State) University. Bureau of Governmental Research and Services. Report. s.n.
Atenció: Aquestes cites poden no estar 100% correctes.