APA ציטוט

Keen, D. (1992). Developing vocabulary skills. Boston, MA: Heinle & Heinle.

Trích dẫn kiểu Chicago

Keen, Dennis. Developing Vocabulary Skills. Boston, MA: Heinle & Heinle, 1992.

ציטוט MLA

Keen, Dennis. Developing Vocabulary Skills. Boston, MA: Heinle & Heinle, 1992.