After using a source one time you can shorten the citation.
Author's Last name, shorten title of the book in Italics, page number. ex. Millard, Destiny of the Republic, 54.
Author's Last Name, Title of Journal in Italics, page number. ex. Cook, The New England Quarterly, 302.
For an electronic resources such as a webpage depending on what information you actually have. For any source you could be missing information, but put as much as you can find.