(1981). Productivity performance of sugar mills by region and mill district, 1969-70 to 1982-83. National Productivity Commission.
Chicago-referens (17:e uppl.)Productivity Performance of Sugar Mills by Region and Mill District, 1969-70 to 1982-83. Pasig, Metro Manila: National Productivity Commission, 1981.
MLA-referens (9:e uppl.)Productivity Performance of Sugar Mills by Region and Mill District, 1969-70 to 1982-83. National Productivity Commission, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.