@inbook{57420910,
author={Stanton A. Glantz},
title={Appendix A. Computational Forms},
booktitle={Primer of Biostatistics, 7e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2012},
url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=57420910}
}