Nwoke na nwanyị na nne
Harold W. Percival
Copyright 1951 site na Harold W. Percival
Copyright 1979 site na The Word Foundation, Inc.
Ikike niile echekwara, gụnyere ikike iji mụta akwụkwọ a ma ọ bụ akụkụ ya n'ụdị ọ bụla.
Mbipụta mbụ, 1951
Mbipụta nke abụọ, 1979
Akwụkwọ nke atọ, 1992
Akwụkwọ nke anọ, 2009
ISBN: 978-0-911650-08-2