Παραπομπή σε μορφή APA (7η εκδ.)

Opel, A., Zaman, S. S., Khanom, F., Aboud, F. E., & Institute of Education Development, B. U. (2016). Evaluation of a mathematics program for preprimary children in rural Bangladesh. © 2012 Elsevier Ltd.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Opel, Aftab, Syeda Sazia Zaman, Ferdousi Khanom, Frances E. Aboud, και BRAC University Institute of Education Development. Evaluation of a Mathematics Program for Preprimary Children in Rural Bangladesh. © 2012 Elsevier Ltd, 2016.

Παραπομπή σε μορφή MLA (8th εκδ.)

Opel, Aftab, et al. Evaluation of a Mathematics Program for Preprimary Children in Rural Bangladesh. © 2012 Elsevier Ltd, 2016.