The Purdue Online Writing Lab: Research and Citation and the Bedford / St. Martin's: Research and Documentation Online 5th ed. are both good resources to help you create citations and bibliographies for your papers.
Following is a selection of free online citation generators that can help students to create citations and manage bibliographies. Remember, though, that no online citation generator is 100% accurate. Please be sure to check your citations to make sure that they include all of the correct information, in the proper order and with the proper capitalization and punctuation!