@inbook{1196799745, author={Roderick J. Little and Roger J. Lewis}, editor={Livingston, Edward H. and Lewis, Roger J.}, title={Estimands, Estimators, and Estimates}, booktitle={JAMA Guide to Statistics and Methods}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={jamaevidence.mhmedical.com/content.aspx?aid=1196799745} }