Weiss, Edda
German vocabulary
McGraw-Hill, 1986
 Buku Teks
Donaldson, Bruce
Mastering German vocabulary : a practical guide to troublesome words
Routledge, 2004
 Buku Referensi
Waitatiri
Teknik pengajaran kosakata pada tiga situs web pembelajaran bahasa Jerman secara elektronik = Vocabulary teaching technique in three German e-learning websites
2016
 UI - Skripsi Membership
McKeane, Alasdair
German
Longman, 1994
 Buku Teks
Peck, Anthony
Mastering German / Anthony Peck
MacMillan,, 1995
 Buku Teks