If there is no author, use the title, abbreviated if necessary, followed by the page number(s).
e.g. He was cut up and boiled in a cauldron by Titans sent by Hera (Classical Mythology 78).
Web documents usually do not have fixed page numbers or any kind of section numbering. If your online source does not have numbering, you have to omit numbers from your parenthetical references. Do not count unnumbered paragraphs. If your source has no pagination, it is to better include the author’s name (or the name of the person that begins the corresponding entry in the works cited list) in the text rather than in a parenthetical reference.
e.g. Nicholas Winkfield compares the situation to the current political environment of Zimbabwe. The works cited list would include an entry that begins with Winkfield.
If a web document does provide definite paragraph numbers, give the abbreviation par. or pars. along with the paragraph number or numbers
e.g. Devereux states that “Finley introduced energy psychology to modern psychiatry in the late twentieth century” (par. 30).