Buku Teks
Edited by Xiaoyu Lu; organized by Jeff Li
Designerbook, [date of publication not identified]
Buku Referensi
Linton, Harold, author
McGraw-Hill, 1999
Buku Teks
Meredith, Carol, author
Rockport Publishers, 2000
Buku Referensi
Livingston, Kathryn, author
Rockport, 1999
Buku Referensi