(2017, 29. March). The difficulty of measuring difficulty Zugriff unter https://www.youtube.com/watch?v=pNju8ihxOMY
APA (7th ed.) Citation(2016). The difficulty of measuring difficulty.
Chicago Style (17th ed.) CitationThe Difficulty of Measuring Difficulty. 2016.
MLA (9th ed.) CitationThe Difficulty of Measuring Difficulty. 2016.
Warning: These citations may not always be 100% accurate.