APA (7th ed.) Citation

Keen, D. (1994). Developing vocabulary skills (2nd ed.). Thomson Heinle.

Chicago Style (17th ed.) Citation

Keen, Dennis. Developing Vocabulary Skills. 2nd ed. Boston: Thomson Heinle, 1994.

MLA (9th ed.) Citation

Keen, Dennis. Developing Vocabulary Skills. 2nd ed. Thomson Heinle, 1994.

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