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

year <- sub(".*(2[[:digit:]]{3})-.*", "\\1", meta$Date, perl = TRUE)
vers <- paste("R package version", meta$Version)

citEntry(entry="Manual",
         title = "sirt: Supplementary item response theory models",
         author = personList(as.person("Alexander Robitzsch")),
         year = year,
         note = vers,
         textVersion =
         paste0("Robitzsch, A. (",
               year,
               "). sirt: Supplementary item response theory models. ",
               vers, "."))

