To cite package ‘XDE’ in publications use:

  A Bayesian model for cross-study differential gene expression R.B.
  Scharpf, H. Tjelmeland, G. Parmigiani, and A.B. Nobel 2009, JASA 104,
  p 1295--1310

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Robert B. Scharpf and Haakon Tjelmeland and Giovanni Parmigiani and Andrew Nobel},
    title = {A Bayesian model for cross-study differential gene
	expression},
    journal = {JASA},
    year = {2009},
    url = {10.1198/jasa.2009.ap07611},
  }