Philippines (Republic). National Economic Council. Four year development plan 1972-75. Inter Documentation Company.
Chicago-referens (17:e uppl.)Philippines (Republic). National Economic Council. Four Year Development Plan 1972-75. Switzerland: Inter Documentation Company.
MLA-referens (9:e uppl.)Philippines (Republic). National Economic Council. Four Year Development Plan 1972-75. Inter Documentation Company.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.