To cite binseqtest in publications use:

  Kirk JL, Fay MP (2014). “An Introduction to Practical Sequential
  Inferences via Single Arm Binary Response Studies Using the
  binseqtest R Package.” _American Statistician_, *68*(4), 230-242.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {An Introduction to Practical Sequential Inferences via Single Arm Binary Response Studies Using the binseqtest R Package},
    author = {Jennifer L. Kirk and Michael P. Fay},
    journal = {American Statistician},
    year = {2014},
    volume = {68},
    number = {4},
    pages = {230-242},
  }