7.68 referring to the speaker

You usually use a reporting verb to report what one person has said or thought, so the subject of a reporting verb is usually a singular noun.

When you report the statements, opinions, orders, or questions of a group of people, you can use a plural noun or a collective noun as the subject of the reporting verb.

When you report what was said on television or radio, or what is printed or written in a newspaper or other document, you can mention the source or means of communication as the subject of a reporting verb.

Note that you can also use 'say' with nouns such as 'sign', 'notice', 'clock', and 'map' as the subject.