APA
Davidsen-Nielsen N., . (1990). Tense and Mood in English. : Walter de Gruyter.
Chicago
Davidsen-Nielsen Niels, . 1990. Tense and Mood in English. : Walter de Gruyter.
Harvard
Davidsen-Nielsen N., . (1990). Tense and Mood in English. : Walter de Gruyter.
MLA
Davidsen-Nielsen Niels, . Tense and Mood in English. : Walter de Gruyter. 1990.