@book{1984wasedadaigakugogakukyoikukenkyujoainugonyumon,
  title = {Ainugo nyūmon},
  author = {Waseda Daigaku. Gogaku Kyōiku Kenkyūjo},
  year = {1984},
  url = {https://openlibrary.org/works/OL23036215W}
}