To cite DTDA in publications use:

Carla Moreira, Jacobo de Uña-Álvarez, Rosa Crujeiras (2010). DTDA: An R Package to Analyze Randomly Truncated Data. Journal of Statistical Software, 37(7), 1-20. URL http://www.jstatsoft.org/v37/i07/.

Corresponding BibTeX entry:

  @Article{,
    title = {{DTDA}: An {R} Package to Analyze Randomly Truncated
      Data},
    author = {Carla Moreira and Jacobo de U\~na-\'{A}lvarez and Rosa
      Crujeiras},
    journal = {Journal of Statistical Software},
    year = {2010},
    volume = {37},
    number = {7},
    pages = {1--20},
    url = {http://www.jstatsoft.org/v37/i07/},
  }