Sometimes documents are published without the names of the individual author(s), such as a document that is released by a government department or a professional organisation. In this case, the organisation's name is used as the "group author." Where the group author is the same as the publisher, leave out the publisher. (With repeated usage, it may be desirable to abbreviate the group author's name. See Abbreviations.)
In-text reference
OR
Reference list
Group author. (Year). Title. Publisher. (omit publisher if same as group author)