4 1 10 Oxford Word Skills: Basic Gairns, Ruth Primary Author Redman, Stuart Primary Author mixed material New York Oxford University Press 2009 Twelve Ways to build a Vocabulary Hart, Archibald Primary Author mixed material New York Barnes & Noble, Inc., 1965 English Word Power Tint Lwin, U, KT. Primary Author mixed material Yangon Thu Ri Ya Publishing House 2007 Similar Meanings and Word Forms mixed material