Website: http://www.easybib.com/ Scan a book bar code with your Smartphone and create an MLA bibliography citation! Download the app to your phone. http://itunes.apple.com/us/app/easybib/id436768184?mt=8
What style to choose - MLA? APA? Chicago? Certain styles are common for certain subject areas. Your teacher will probably tell you which style to use. Use one style throughout your paper. Be consistent!
Use the Purdue Online Writing Lab (OWL) site for details on layout, order and in-text citations ... and to double-check what your online bibliography maker has generated. Chicago - common style for History class. MLA style- common for Humanities. APA style - common for Sciences and Psychology.