1. Papanicolaou Society for Cytopathology;LjungBM.Fine needle aspiration (FNA) biopsy techniques. A series of 13 fine needle aspiration (FNA) educational videos from the DVD by Britt‐Marie Ljung MD. Published 1990. Accessed June 25 2019.https://www.youtube.com/playlist?list=PLn1z_EFdhDPE2SCEFKeuvuLUNLZMp69pg
2. USCAP Your Academy;LjungBM.Fine needle aspiration biopsy (FNA) techniques‐Dr. Britt Marie Ljung. Published 2018. Accessed June 25 2019.https://www.youtube.com/watch?v=mXh9en_nCBU
3. Observational learning and the acquisition of motor skills‐toward a visual‐perception perspective;Scully D;J Hum Move Studies,1985
4. Easier Seen Than Done: Merely Watching Others Perform Can Foster an Illusion of Skill Acquisition
5. Resuscitation: experience without feedback increases confidence but not skill.