Final answer:
You should not include a page number in the parenthetical reference if you are citing a single-page source. Always use a signal phrase to introduce the source, and consult with your professor or citation guidelines for the appropriate citation format.
Step-by-step explanation:
If a source is only one page long, you should not include a page number in the parenthetical reference. When citing works of any length, including single-page sources or entire works such as books, websites, single-page articles, tweets, videos, or films, you should omit the page number in the citation. This applies to various citation styles, including APA, where the focus is on the author and the year of publication when the author is known.
When you quote, paraphrase, or summarize a source, a signal phrase is typically used to introduce the source, and the actual text is placed in quotation marks if it is a direct quote. If the author's name is stated in the signal phrase, the parenthetical citation only includes the page number if available. However, for works with no page numbers, like some online sources, you can include the paragraph number (e.g., para. 18) or another way to direct the reader to the specific part of the text being cited.
To ensure you follow the proper citation rules for your assignment, it's important to consult with your professor or refer to the guidelines of the specific citation style you are using (such as MLA, APA, or Chicago).