To cite package 'cda' in publications use:

Baptiste Auguie (2011). cda: Coupled dipole approximation with R and C++. R package version 1.1.3.

Corresponding BibTeX entry:

  @Manual{,
    title = {cda: Coupled dipole approximation with R and C++},
    author = {Baptiste Auguie},
    year = {2011},
    note = {R package version 1.1.3},
  }