Constructs an object of type "Citation".
Citation(suffix, id, note_num = 0L, mode = "AuthorInText",
prefix = list(), hash = 0L)a inline object or list of inline objects
a character string (not visible in the text)
an integer
a character string giving the citation mode, possible values are
"AuthorInText", "SuppressAuthor" and "NormalCitation".
a inline object or list of inline objects
an integer