TVXQ
Tense Tvxq! 10th Anniversary
S.M Entertaiment, 2014
 Multimedia
TVXQ
TVXQ. [7th album]. Tense
S.M Entertaiment, 2014
 Multimedia
TVXQ. [7th album]. Tense
SM Entertainment, 2014
 Buku Teks
Poutsma, H.
Mood and tense of the English verb
P. Noordhoff, 1922
 Buku Teks SO
Hornstein, Norbert
As times goes by tense and universal grammar
MIT Press, 1990
 Buku Teks SO