Miller, Katherine, author
Wardsword Cengage Learning, 2012
Buku Teks
Erwin Yulianto, author
Medwell Journals, 2016
Artikel Jurnal
Barrett, Deborah J., author
McGraw-Hill , 2006
Buku Teks
Barrett, Deborah J., author
McGraw-Hill , 2014
Buku Teks
Edgina Christabel, author
2017
UI - Skripsi (Membership)