User:Starrynight555/sandbox

Practicing Citations
This source is authoritative because the authors are experts in the field; at the same time, the publisher specializes in cytogenic and genome research.

This article is a collaboration of the Department of Anatomy in Howard University College of Medicine, the Department of Biology in the University of Sao Paulo, the Structure and Motion Laboratory Department of Comparative Biomedical Sciences in the Royal Veterinary College, UK.

This source contributes to my topic in that it describes in details of the evolution of Australidelphias through examining the teeth and petrosal bones.

This is a credible source because it is part of an encyclopedia, in which it is regarded as a good source.

This source is authoritative because it is an academic journal, and the research is from the School of Biology, Earth and Environmental Sciences from the University of New South Wales, Australia.