Curriculum Development Centre. (1971). Tonga bbuku (Experimental version.). NECZAM [National Educational Company of Zambia.
Citazione stile Chigago Style (17a edizione)Curriculum Development Centre. Tonga Bbuku. Experimental version. Lusaka: NECZAM [National Educational Company of Zambia, 1971.
Citatione MLA (9a ed.)Curriculum Development Centre. Tonga Bbuku. Experimental version. NECZAM [National Educational Company of Zambia, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.