Cornog, Mary Wood
Merriam-Webster?s vocabulary builder
Merriam-Webster Inc., 1994
 Buku Referensi
Hanyu 8000 ci cidian (A dictionary of Chinese usage:8000 words) HSK:Zhonggud hanyu shuiping kaoshi cindi dagang (Cinese proficency test vocabulary guideline) editor
Beijing Beijing Yuyan Wenhua Daxuie Chubanshe 2000
 Buku Referensi
Mackie, Benita
Building sentences/by Benita Mackie, Shirley Johnsen Rompf
Upper Saddle River,N.J. Prentice Hall 1995,
 Buku Teks
English workshop
New York : Holt, Rinehart and Winston, 1995,
 Buku Teks
Nababan, Melva Ratna Rulida
Peralihan pola perolehan dan penggunaan bahasa di Indonesia
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1983
 UI - Skripsi Membership