Comrie, Bernard, 1947-
Tense
Cambridge University Press, 1985
 Buku Teks SO
Koch, Janice
Teach
Wadsworth , 2012
 Buku Referensi
TVXQ. [7th album]. Tense
SM Entertainment, 2014
 Buku Teks
Arends, Richard I., 1990-
Learning to teach
McGraw-Hill, 2012
 Buku Teks
Arends, Richard I., 1990-
Larning to teach
McGraw-Hill, 1989
 Buku Teks