The holt basic dictionary of American English
editor, Alvina Treut Burrows
Holt, Rinehart and Winston, 1966
 Buku Referensi
The holt intermediate dictionary of American English
Holt, Rinehard and Winston, Inc.
Holt, Rinehart and Winston,Inc, 1966
 Buku Teks
The holt intermediate dictionary of American English
Holt, Rinehart and Winston, 1966
 Buku Referensi
Freund, John E.
Dictionary/outline; of basic statistics
McGraw-Hill, c1966
 Buku Teks
Walters, Morgan L
Basic dictionary of American English
N.Y.Holt Rinehart and Winston,inc, 1966
 Buku Teks