ref.bib

@book{OLDAPul,
  author = {Anahuac de Paula Gil},
  title = {OpenLDAP Ultimate},
  year = {2015},
  publisher = {Buqui},
  isbn = {978-85-8338-185-3},
  url = {http://www.anahuac.eu/livros-em-cc-by/},
  urldate = {2021-04-01}
}