hassouna, w. a. (1970). basic economic concepts for health planners. the institute of national planning.
Cytowanie według stylu Chicago (wyd. 17)hassouna, w. a. Basic Economic Concepts for Health Planners. cairo: the institute of national planning, 1970.
Cytowanie według stylu MLA (wyd. 9)hassouna, w. a. Basic Economic Concepts for Health Planners. the institute of national planning, 1970.