A thing like this is almost always the work of a single person.

I thought, this is the work of a very ripe person in his 60's.

The printing looked to be the work of a young person, probably a woman because of its neatness.

These early naming conventions fit the Czech language and, being mostly work of a single person, provided a consistent way to name chemical compounds.

It is claimed to be the second Indonesian encyclopedia that was the work of a single person.

Her preface says that it is published only as an example of the early work of a person who was (much) later a successful writer.

Every one of the novels I was sent was the work of a talented person.

Scientists seem more able to accept the work of a person with severe physical disability than the general population.

Quite obviously, there is no point in attributing the tragedy to the Devil; therefore, what took place can only be the work of a person.

An energy slave does the work of a person, through the consumption of energy in the non-human infrastructure.