- by John T. Hansen PhD
Merriam-Webster's Collegiate Dictionary, 11th Edition, Jacketed Hardcover, Indexed, 2020 CopyrightAug 1, 2019by Merriam-Webster and Inc.
- by Terry Mahan Buttaro PhD AGPCNP-BC FAANP FNAP and Patricia Polgar-Bailey PsyD MPH FNP-BC CDE BC-ADM
- by Laura Rosenthal DNP ACNP and Jacqueline Burchum DNSc APRN BC
- by Benjamin J. Sadock and Virginia A. Sadock