APA ציטוט

Douglas, N. (2013). World class 2: Expanding English fluency. National Geographic Learning.

Chicago Style (17th ed.) Citation

Douglas, Nancy. World Class 2: Expanding English Fluency. United Kingdom: National Geographic Learning, 2013.

ציטוט MLA

Douglas, Nancy. World Class 2: Expanding English Fluency. National Geographic Learning, 2013.