Japanese phrase
この___の出典は何ですか？ ko no ___ no shut ten wa nan de su ka
Meaning
What is the source of this ___?
When to use it
Asks where a specific item comes from. It is commonly used to check the origin of a quotation or piece of information in a careful and polite way.
Example dialogue
この引用の出典は何ですか？ ko no in yō no shut ten wa nan de su ka
What is the source of this quote?
新聞記事からです。 shin bun ki ji ka ra de su
It is from a newspaper article.