Byon, Andrew Sangpil
Basic korean : a grammar and workbook
Routledge, Taylor & Francis Group, 2009
 Buku Teks SO
Yip, Po-ching
Basic Chinese : a grammar and workbook
Routledge, 2009
 Buku Teks
Murray, John D. [John Damian]
Basic Russian : a grammar and workbook / John Murray and Sarah Smyth.
Routledge, 1999
 Buku Teks SO
Murray, John D. [John Damian]
Intermediate Russian: a grammar and workbook
Routledge, 2001
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Miell, Anna
Intermediate German : a grammar and workbook
Routledge, 2006
 Buku Teks SO