Otú mmanya na-aba n'anya si emetụta anya gị

Ọ bụ ezie na ịṅụ mmanya na-aba n'anya agaghị eme ka nsogbu ahụ ike, ịṅụbiga mmanya ókè nwere ike inwe mmetụta dị njọ n'ahụ gị, gụnyere anya gị. Ịṅụ mmanya na-aba n'anya nwere ike ịkpata nsogbu na ọhụụ gị na ahụike anya anya gụnyere ihe ndị a:

Isi Iyi

Alexander, Larry J, OD. Nlekọta nke Isi nke Ahịa elu, Nke atọ. Mcgraw-Hill, 2002.