Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Wing Chun:

"

In ancient China, Wing Chun, like all other martial arts or craft guilds, was traditionally passed on in a familiar way, from master to student. The master, who had personal responsibility for the entire training of the student (apprentice), was addressed as Sifu (master). The lessons often took place in the master's house, where a personal bond would develop between the master and his family and the student (apprentice), with certain mutual obligations. The first public martial arts schools were established in Hong Kong. Since then, Wing Chun's lessons have taken on a more modern, academic, and commercial character.[citation needed]