APA

Social Inquiry Associates I., . (1973). Free choice in Puerto Rico: a comprehensive review. New Orleans, La: .

Chicago

Social Inquiry Associates Inc, . 1973. Free choice in Puerto Rico: a comprehensive review. New Orleans, La: .

Harvard

Social Inquiry Associates I., . (1973). Free choice in Puerto Rico: a comprehensive review. New Orleans, La: .

MLA

Social Inquiry Associates Inc, . Free choice in Puerto Rico: a comprehensive review. New Orleans, La: . 1973.