To cite package 'marked' in publications use:

Laake J, Johnson D, Conn P (2013). “marked: An R package for maximum-likelihood and MCMC analysis of capture-recapture data.” Methods in Ecology and Evolution.

Corresponding BibTeX entry:

  @Article{,
    author = {J.L. Laake and D.S. Johnson and P.B. Conn},
    year = {2013},
    title = {marked: An R package for maximum-likelihood and MCMC
      analysis of capture-recapture data.},
    journal = {Methods in Ecology and Evolution},
  }