Meade, Richard A.
Effective English: workbook 3 and 4
Belmont, 1964
 Buku Teks SO
Langan, John, 1942-
Sentence skills : a workbook for writers
McGraw-Hill, 1994
 Buku Teks SO
Oosterhoff, Jenneke A.
Basic dutch : a grammar and workbook
Routledge, 2009
 Buku Teks
Morris, Susan
The Nelson first certificate workbook / Susan Morris, Alan Stanton
Susan Morris, 1993
 Buku Teks SO
Graham, Sheila Y.
Harbrace college workbook form 7A / Sheila Y. Graham
Harcourt Brace Jovanovich , 1972
 Buku Teks SO