To cite package 'FIESTA' in publications use:

Frescino TS, Patterson PL, Moisen GG, Toney C, Freeman EA (2009). FIESTA: A Forest Inventory Estimation and Analysis R Package. USDA Forest Service, Rocky Mountain Research Station, 507 25th street, Ogden, UT, USA. tracey.frescino@usda.gov.

Corresponding BibTeX entry:

  @Manual{,
    title = {FIESTA: A Forest Inventory Estimation and Analysis R
      Package},
    author = {Tracey S. Frescino and Paul L. Patterson and Gretchen G.
      Moisen and Chris Toney and Elizabeth A. Freeman},
    year = {2009},
    organization = {USDA Forest Service, Rocky Mountain Research
      Station},
    address = {507 25th street, Ogden, UT, USA},
    note = {tracey.frescino@usda.gov},
  }