APA

Roberts R. W., . (1947). On-the-job education in rural communities. Washington: .

Chicago

Roberts Roy W, . 1947. On-the-job education in rural communities. Washington: .

Harvard

Roberts R. W., . (1947). On-the-job education in rural communities. Washington: .

MLA

Roberts Roy W, . On-the-job education in rural communities. Washington: . 1947.