Clark, A. L. (1986). Mineral resource assessment for national planning and policy formulation. Resource Systems Institute, East West Center.
Cita Chicago (17th ed.)Clark, Allen L.l. Mineral Resource Assessment for National Planning and Policy Formulation. Hawaii: Resource Systems Institute, East West Center, 1986.
Cita MLA (9th ed.)Clark, Allen L.l. Mineral Resource Assessment for National Planning and Policy Formulation. Resource Systems Institute, East West Center, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.