To cite package 'robCompositions' in publications you might use:

  Matthias Templ, Karel Hron, Peter Filzmoser (2011). robCompositions:
  an R-package for robust statistical analysis of compositional data.
  In V. Pawlowsky-Glahn and A. Buccianti, editors, Compositional Data
  Analysis. Theory and Applications, pp. 341-355, John Wiley & Sons,
  Chichester (UK) .

A BibTeX entry for LaTeX users is

  @Book{,
    title = {rob{C}ompositions: an R-package for robust statistical analysis of compositional data},
    author = {Matthias Templ and Karel Hron and Peter Filzmoser},
    publisher = {{J}ohn {W}iley and {S}ons},
    isbn = {978-0-470-71135-4},
    booktitle = {{C}ompositional {D}ata {A}nalysis: {T}heory and {A}pplications},
    year = {2011},
    pages = {341--355},
    doi = {10.1002/9781119976462.ch25},
  }

  Peter Filzmoser, Karel Hron, Matthias Templ (2018). Applied
  Compositional Data Analysis. With Worked Examples in R. Springer
  Series in Statistics. Springer International Publishing, Cham,
  Switzerland .

A BibTeX entry for LaTeX users is

  @Book{,
    title = {Applied Compositional Data Analysis. With Worked Examples in {R}},
    author = {Peter Filzmoser and Karel Hron and Matthias Templ},
    publisher = {Springer International Publishing. Springer Nature Switzerland AG, Cham, Switzerland},
    note = {Springer Series in Statistics},
    isbn = {978-3-319-96420-1},
    doi = {10.1007/978-3-319-96422-5},
    year = {2018},
  }