hassouna, w. a. (1970). basic economic concepts for health planners. the institute of national planning.
Παραπομπή σε μορφή Chicago (17η εκδ.)hassouna, w. a. Basic Economic Concepts for Health Planners. cairo: the institute of national planning, 1970.
Παραπομπή σε μορφή MLA (9th εκδ.)hassouna, w. a. Basic Economic Concepts for Health Planners. the institute of national planning, 1970.