How can I cite something/add a reference

Taken from [Biblio]

"You can easily add citations by typing Goldbeter-PNAS-1981 Jacob-JMB-1961 Ptashne-Genetic-Switch  which gives you [ 1, 2, 3]. To insert a list of references type
 * 1) Goldbeter-PNAS-1981 pmid=6947258
 * 2) Jacob-JMB-1961 pmid=13718526
 * 3) Ptashne-Genetic-Switch isbn=0879697164