Pakistan. National Bureau of Curriculum and Textbooks. (1974). Agro-technical studies curriculum for classes VI-VIII. The Bureau.
Chicago-referens (17:e uppl.)Pakistan. National Bureau of Curriculum and Textbooks. Agro-technical Studies Curriculum for Classes VI-VIII. Islamabad: The Bureau, 1974.
MLA-referens (8:e uppl.)Pakistan. National Bureau of Curriculum and Textbooks. Agro-technical Studies Curriculum for Classes VI-VIII. The Bureau, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.