Many of the humanities and history use Chicago citation style.
The final authority for Chicago style is the Chicago Manual of Style (16th ed., 2010). The final authority for the bibliographic form used in your paper is your professor.
The Chicago Manual of Style requires either
1) footnotes and a bibliography or
2) in-text author-date citations and reference list.
For footnotes, the first time a source appears in a footnote, the full citation is given. The second and subsequent times that source is listed only the author's last name, an abbreviated title, and the page number need to be included.
In a printed work, if a URL or DOI has to be broken at the end of a line, the break should be made after a colon or a double slash (//); before a single slash(/), a tilde (~), a period, a comma, a hyphen, an underline (_), a question mark, a number sign, or a percent symbol; or before or after an equals sign or an ampersand....A hyphen should never be added to a URL or DOI to denote a line break, nor should a hyphen that is part of a URL or DOI appear at the end of a line.