The holt intermediate dictionary of American English
Holt, Rinehard and Winston, Inc.
Holt, Rinehart and Winston,Inc, 1966
 Buku Teks SO
The holt basic dictionary of American English
editor, Alvina Treut Burrows
Holt, Rinehart and Winston, 1966
 Buku Referensi
Walters, Margan L
Intermediate dictionary of American english
N.Y.Holt,Rinehart and winston,ic, 1966
 Buku Teks
Walters, Morgan L
Basic dictionary of American English
N.Y.Holt Rinehart and Winston,inc, 1966
 Buku Teks
Kenyon, John Samuel
A pronouncing dictionary of American English
Merriam-Webster ; G. & C. Merriam Co., 1953
 Buku Referensi