{
  "book": {
    "authors": [
      "Werner Hüllen",
      "Wulf Künne"
    ],
    "authorship": "known",
    "pages": 173,
    "publisher": "Klett",
    "title": "English and American Poetry, Book"
  },
  "cached": true,
  "citations": {
    "apa": "Hüllen, W., \u0026 Künne, W. (1999). English and American Poetry, Book. Klett.",
    "bibtex": "@book{isbn9783125064003,\n  title = {English and American Poetry, Book},\n  author = {{Werner Hüllen} and {Wulf Künne}},\n  publisher = {Klett},\n  year = {1999},\n  isbn = {9783125064003},\n}",
    "chicago": "Hüllen, Werner, and Wulf Künne. English and American Poetry, Book. Klett, 1999.",
    "mla": "Hüllen, Werner, and Wulf Künne. English and American Poetry, Book. Klett, 1999.",
    "wp": "{{cite book |title=English and American Poetry, Book |author1=Werner Hüllen |author2=Wulf Künne |publisher=Klett |year=1999 |isbn=9783125064003}}"
  },
  "consulted": {
    "answered": 1,
    "consulted": 1,
    "not_asked": 0,
    "not_held": 0
  },
  "found": true,
  "isbn": {
    "input": "9783125064003",
    "isbn13": "9783125064003",
    "normalized": "9783125064003",
    "valid": true
  },
  "ok": true,
  "quality": {
    "state": "partial",
    "omissions": [
      {
        "field": "issued",
        "reason": "missing_evidence"
      },
      {
        "field": "responsibility",
        "reason": "unverified_roles"
      }
    ]
  },
  "supported_styles": [
    "mla",
    "apa",
    "chicago",
    "wp",
    "bibtex"
  ]
}
