Langan, John, 1942-
College writing skills and college writing skills with readings
McGraw-Hill , 2001
 Multimedia
Langan, John, 1942-
College writing skills and college writing skills with readings
MCGraw-Hill, 2001
 Multimedia
Langan, John, 1942-
College writing skills with readings
McGraw-Hill, 2001
 Buku Teks SO
Langan, John, 1942-
College writing skills, with readings
McGraw Hill, 2019
 Buku Teks SO
Folse, Keith S.
Intermediate reading practices building reading and vocabulary skills
Binarupa Aksara Press , 1993
 Buku Teks SO