@Book{kn:texbook,
  author    = "Donald E. Knuth",
  title     = "The {\TeX}book",
  publisher = "Addison-Wesley",
  year      = 1989,
  edition   = "Fifteenth",
  isbn      = "0-201-13447-0"
  note      = "Paperback ISBN: 0-201-13448-9"
}