For Physics courses at Trent, if your professor doesn't specify, try using the style used by the Canadian Journal of Physics. See the author instructions or look at an article in the journal. Other acceptable styles might be CSE or APA as listed below.
Scientific Style and Format by 
Publication Manual of the American Psychological Association by 
MLA Style Manual and Guide to Scholarly Publishing by Use a web-based citation tool to seemlessly create and organize your own personal online filing cabinet of references and to create bibliographies.
