citHeader("To cite package 'ltm' in publications use:")

citEntry(entry = "Manual",
         title = "ltm: Latent Trait Models under IRT",
         author = personList(as.person("D. Rizopoulos")),
         year         = 2006,
         note         = "R package version 0.6-1",
         url          = "http://wiki.r-project.org/rwiki/doku.php?id=packages:cran:ltm",
         
         textVersion = 
         paste("Rizopoulos, D. (2006)", 
               "'ltm: Latent Trait Models under IRT'.",
               "R package version 0.6-1.")
)