* Non-academic books: This is a broad term that covers any book not written for a scholarly audience. This would include fiction, memoirs, self-help books, and more.
* General interest books: This refers to books intended for a wide audience and usually don't delve into deep academic research.
* Narrative books: These books focus on storytelling and may not have any references at all, or they might have minimal references for plot or character development. This includes novels, biographies, and memoirs.
* Books without footnotes or endnotes: If you're specifically talking about books that lack these common types of references, you could describe them as books "without footnotes" or "without endnotes."
* Books with limited or no bibliography: If you're interested in books that lack a comprehensive list of sources, you could describe them as books "with limited bibliography" or "without a bibliography."
Ultimately, the best way to describe a book without references depends on the specific context and the reason for not having them.