This image is believed to be covered by the U.S. fair use laws because:
No free alternative can exist given the likeness of the characters Scrooge McDuck, Donald Duck, Huey, Dewey, and Louie, and Goldie O'Gilt are trademarks and thus protected;
It is a low resolution copy of a comic book cover;
It does not limit the copyright owner's rights to sell the comic book in any way;
Copies could not be used to make illegal copies of the comic book cover art on another comic book;
The issue in question is discussed within the article, thus using this image to identify the issue is believed to be fair use.
No free use image available. As this is a fictional, copyrighted character and a copyrighted publication, a freely-licensed alternative could not reasonably be obtained.
This image is from a comic strip, webcomic or from the cover or interior of a comic book. The copyright for this image is most likely owned by either the publisher of the comic or the writer(s) and/or artist(s) which produced the comic in question. It is believed that
the use of low-resolution images of the cover of a comic book to illustrate:
the issue of the comic book in question;
the periodical comic book series of which this issue is a part; or
the copyrighted comic book character(s) or group(s) on the cover of the issue in question;
or the use of low-resolution images of a single panel from a comic strip or an interior page of a comic book to illustrate:
the scene or storyline depicted, or
the copyrighted character(s) or group(s) depicted on the excerpted panel in question;
where no free alternative exists or can be created,