Vietnam. Directorate General of Planning. (1972). Four-year national economic development plan: 1972-1975. Directorate General of Planning.
Citazione stile Chigago Style (17a edizione)Vietnam. Directorate General of Planning. Four-year National Economic Development Plan: 1972-1975. Saigo: Directorate General of Planning, 1972.
Citatione MLA (9a ed.)Vietnam. Directorate General of Planning. Four-year National Economic Development Plan: 1972-1975. Directorate General of Planning, 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.