APA Citation

Sri Widyastuti, A. (1989). The frequencies of the auxiliary verbs in the English textbooks for the students of senior high school. USD.

Chicago Style Citation

Sri Widyastuti, Agustina. The Frequencies of the Auxiliary Verbs in the English Textbooks for the Students of Senior High School. USD, 1989.

MLA Citation

Sri Widyastuti, Agustina. The Frequencies of the Auxiliary Verbs in the English Textbooks for the Students of Senior High School. USD, 1989.

Warning: These citations may not always be 100% accurate.