Their book is regarded as the definitive work, if probably not the final word, on the subject.

It is regarded as the leading work on the topic.

He regards his teaching job as his most important work.

This book is widely regarded as the most comprehensive work on the topic.

It is often regarded as the band's best work, being a much more serious effort than their debut album.

Despite this, the band was happy with the album and it has often been regarded as their finest work.

Widely regarded as the best single-volume work in English on the subject.

It is the care of cattle which is regarded as man's work.

Barker privately regarded the series as the finest work of his career.

Many people regard it as the Kansas City artist's best work.