Emalia Iragiliati Sukarni
English for medical purposes, Indonesia for Medical Purposes, and its pragmatics use / Emalia Iragiliati Sukarni
Bayumedia Publlishing,, 2007
 Buku Teks SO
Cotton, David
Market Leader: pre-intermediate
Pearson Education Limited, 2012
 Multimedia
Cunningham, Sarah
Everyday listening and speaking pre-intermediate
Oxford University Press , 1994
 Buku Teks SO
Dendy Sugono
Berbahasa Indonesia dengan benar
Puspa Swara, 1999
 Buku Teks SO
Soedjito
Kalimat efektif
Remaja Rosdakarya , 1999
 Buku Teks SO