Polygonia comma form of comma is frequently confused with the dark form of the question mark ("P. interrogationis"), but the two can readily be distinguished by the shape of the comma mark on the underside. The pale form is easily confused with the satyr comma ("P. satyrus"), which usually occurs north and west of the eastern comma's range. They can be distinguished by the upperside color, which is orange brown in the comma and tawny yellowish brown in "P. satyrus"; by the underside pattern, which tends to be mottled in the comma but appears to be more longitudinally streaked in "P. satyrus";
The Chicago Manual of Style an interposed comma. If the author's name is used in the text, only the date of publication need be cited parenthetically (with or without the page number). In-text citations are usually placed just inside a mark of punctuation. An exception to this rule is for block quotations, where the citation is placed outside the punctuation. The full citation for the source is then included in a references section at the end of the material. As publication dates are prominent in this style, the reference entry places the publication date "following" the author(s) name. Using notes and bibliography style, the sourced