@misc{ wiki:xxx,
    title = "Diesel fuel --- {Wikipedia}",
    year = "2019",
    howpublished = {\url{https://en.wikipedia.org/wiki/Diesel\_fuel}},
    note = "[Online; accessed 08-Jan-2019]"
}

@book { chembook,
  author = "{Taylor et. al.}",
  title = "Chemistry 2: VCE units 3\&4",
  year = "2017"
}