Yerbury, J. C., Dingalo, M., & Mphinyane, O. (1991). Evaluation of the Distance Education Unit, Department of Non-Formal Education. Commonwealth of Learning.
Citação norma ChicagoYerbury, J. Colin, Mary Dingalo, and Obonye Mphinyane. Evaluation of the Distance Education Unit, Department of Non-Formal Education. Botswana: Commonwealth of Learning, 1991.
Citação norma MLAYerbury, J. Colin, et al. Evaluation of the Distance Education Unit, Department of Non-Formal Education. Commonwealth of Learning, 1991.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.