Map<String, Schema.SObjectField> objectFields = Schema.getGlobalDescribe().get(objectName).getDescribe().fields.getMap();
        for(String s : objectFields.keySet()) {
            Schema.DescribeFieldResult lfieldLabel = objectFields.get(s).getDescribe();
            Schema.DisplayType dType = lfieldLabel.getType();
            FieldNameReference = lfieldLabel.getName();
            FieldTypeReference = String.ValueOf(dType);
            if(dType == Schema.DisplayType.REFERENCE) {
                fieldsList.put(lfieldLabel.getName(), lfieldLabel.getLabel());
            }
        }