Seybert, Mildred; Olson, Lyla Mae (September 6, 1942). "Taffy and Tuffy". New York, London, D. Appleton-Century company, incorporated – via Internet Archive.
Olson, Lyla M. (1932). "A Handy Medicine Cabinet: Some Newer Drugs". The American Journal of Nursing. 32 (9): 957–958. doi:10.2307/3410924. JSTOR3410924.
Olson, Lyla M. (1932). "A Handy Medicine Cabinet: Some Newer Drugs". The American Journal of Nursing. 32 (9): 957–958. doi:10.2307/3410924. JSTOR3410924.
mayo.edu
college.mayo.edu
"Capping". college.mayo.edu. Mayo Clinic College of Medicine & Science. Retrieved September 30, 2020.
"Pinning". college.mayo.edu. Mayo Clinic College of Medicine & Science. Retrieved September 30, 2020.
"History". college.mayo.edu. Mayo Clinic College of Medicine & Science.