To cite the 'circular' package in publications use:

C. Agostinelli and U. Lund (2013). R package 'circular': Circular Statistics (version 0.4-7). URL

Corresponding BibTeX entry:

    title = {{R} package \texttt{circular}: Circular Statistics
      (version 0.4-7)},
    author = {C. Agostinelli and U. Lund},
    address = {CA: Department of Environmental Sciences, Informatics
      and Statistics, Ca' Foscari University, Venice, Italy. UL:
      Department of Statistics, California Polytechnic State
      University, San Luis Obispo, California, USA},
    year = {2013},
    url = {},