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 Carl Jung:

"

Jung identified two primary 'attitudinal types'—introvert and extrovert.[1] While the terms 'introversion' and 'extraversion' had prior use in European thought, Jung was the first to integrate them into a comprehensive structural theory of personality.[citation needed] He redefined these concepts not merely as social traits, but as fundamental directions of psychic energy (libido), establishing the first systematic model of psychological types based on the movement of psychic energy libido toward the subject or the object.[2][3][4]