Txiv neej thiab poj niam thiab tus me nyuam
Harold W. Percival
Copyright 1951 los ntawm Harold W. Percival
Copyright 1979 los ntawm The Word Foundation, Inc.
Txhua txoj cai tshwj tseg, nrog rau txoj cai muab tsim cov phau ntawv no los yog ib feem ntawm qhov no.
Thawj luam, 1951
Tshuab luam tawm ob, 1979
Peb luam tawm, 1992
Plaub luam, 2009
ISBN: 978-0-911650-08-2