To cite 'saws' package use the following reference:

Fay, M.P., and Graubard, B.I. (2001). Small-Sample Adjustments for Wald-Type Tests Using Sandwich Estimators Biometrics 57: 1198-1206

Corresponding BibTeX entry:

  @Article{,
    title = {Small-Sample Adjustments for Wald-Type Tests Using
      Sandwich Estimators},
    author = {Michael P. Fay and Barry I. Graubard},
    journal = {Biometrics},
    year = {2001},
    volume = {57},
    pages = {1198--1206},
  }