National Assessment of Educational Progress (Project). (1979). Science objectives for the third assessment. NAEP.
Chicago-referens (17:e uppl.)National Assessment of Educational Progress (Project). Science Objectives for the Third Assessment. Denver, Colorado: NAEP, 1979.
MLA-referens (9:e uppl.)National Assessment of Educational Progress (Project). Science Objectives for the Third Assessment. NAEP, 1979.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.