Numbered styles list references in the order they are mentioned, using a digit in the text to refer to the fuller citation at the end.
The most common numbered style is Vancouver - while this style has its own particular rules, numbered styles in general are often referred to as Vancouver styles.
Here's our example in the Vancouver style, using the "official" rules given by the NLM/PubMed.
In the text:
"As the global information landscape increasingly facilitates the sharing, re-purposing and dissemination of information, the ways in which students are accustomed to interacting with information resources are also changing" (1).
1. Stagg A, Kimmins L, Pavlovski N. Academic style with substance: A collaborative screencasting project to support referencing skills. The Electronic Library. 2013;31(4):452-64.Pavlovski N. Academic style with substance. The Electronic Library. 2013;31(4):452-64.