The following quotation comes from Buettner-Janusch's authoritative textbook of physical anthropology published in 1966:

This gives the series authority, and many are or have been authoritative introductory textbooks on a subject for some years.

Avicenna's The Canon of Medicine remained an authoritative medical textbook in Europe until the 18th century.

This book is not intended to be an authoritative textbook.

The book is still published under the title Gray's Anatomy and is widely appreciated as an extraordinary and authoritative textbook for medical students.

Even authoritative textbooks can be inconsistent in their use of the term.

But this is not an authoritative textbook.

John Maynard Smith agreed with this view in his authoritative textbook, but the question is still not definitively settled.

Pittet is author/co-author of approximately 500 publications, including 300 peer-reviewed publications and 50 chapters in authoritative medical textbooks.

Maynard Smith agreed with this view in his authoritative textbook.