Long, Calvin T., author
Pearson - Addison Wesley, 2009
Buku Teks
Thomas, David A.
Allyn and Bacon, 1991
Buku Teks
Sheffield, Linda Jensen
John Wiley & Sons, 2000
Buku Teks
Stephanie Yuanita Indrasari, author
2017
UI - Skripsi (Membership)
Nurul Fitriana Dewi, author
2017
UI - Skripsi (Membership)