APA

Organization of American States, . (1969). Physical resource investigations for economic development: a casebook of OAS field experience in Latin America. Washington: General Secretariat, Organization of American States.

Chicago

Organization of American States, . 1969. Physical resource investigations for economic development: a casebook of OAS field experience in Latin America. Washington: General Secretariat, Organization of American States.

Harvard

Organization of American States, . (1969). Physical resource investigations for economic development: a casebook of OAS field experience in Latin America. Washington: General Secretariat, Organization of American States.

MLA

Organization of American States, . Physical resource investigations for economic development: a casebook of OAS field experience in Latin America. Washington: General Secretariat, Organization of American States. 1969.