Second language writing : research insights for the classroom
editedby Barbara Kroll
Cambridge University Press, 1990
 Buku Teks SO
Harris, David P.
Testing english as a second language
McGraw-Hill, 1969
 Buku Teks SO
Stella Estee Samantha
Je bent nooit te oud om te leren: muatan budaya Belanda dalam buku ajar bahasa Belanda Contact! 1 Nederlands voor anderstaligen (2014) = Je bent nooit te oud om te leren: Dutch cultural content in Dutch language book Contact! 1 Nederlands voor anderstaligen (2014)
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2018
 UI - Skripsi Membership
Allen, Edward David, 1923-
Classroom techniques : foreign languages and English as a second language
Harcourt Brace Jovanovich, c1977
 Buku Teks SO
Designing second language performance assessments
by John M. Norris ... [and others]
University of Hawaii Press, 1998
 Buku Teks SO