Garth Brooks is an investigative journalist employed by the Victorian Investigator, an online subscription news service. He is contacted by a personal assistant to an MP who wishes to remain anonymous. The assistant tells Garth that Frank Spencer an MP for the opposing Party was recently having an extramarital sexual relationship with her employer. When the relationship ended abruptly Frank went on a "bender" being drunk for a week and destroying a hotel room. The assistant tells Garth that he doesn't want his name or identity disclosed in any report that is published on this issue, as he is afraid that he will lose his job. Garth writes an article titled 'MP's blind drunk rampage', which is published in a prominent position in the Victorian Investigator. The article refers to a 'reliable source' for the information, who 'works for' the anonymous MP. Frank Spenser seeks your advice on whether He can require the Victorian Investigator to disclose the source of the information in the article. Provide Frank advice on this particular issue.