APA引文

SHEELER, W. D. (1991). WELCOME TO ENGLISH BOOK 6. OXPORD UNIVERSITY PRESS.

Chicago Style (17th ed.) Citation

SHEELER, WILLARD D. WELCOME TO ENGLISH BOOK 6. OXPORD UNIVERSITY PRESS, 1991.

MLA引文

SHEELER, WILLARD D. WELCOME TO ENGLISH BOOK 6. OXPORD UNIVERSITY PRESS, 1991.