You can't just make up your own way to cite sources. Instead, you need to choose and apply one of the official Citation Styles. Some examples of Citation Styles include:
APA - American Psychological Association - used in the sciences and social sciences
MLA - Modern Language Association - used mostly in the humanities
Chicago or Turabian - used mainly in the humanities and history
Your professor will probably tell you which of these styles to use. If not, ASK!
