The Modern Language Association (MLA) is the style ICS uses for all research assignments. It dictates how sources are cited within a paper, and how that paper is formatted.
The concept of containers is crucial to MLA style. When the source being documented forms part of a larger whole, the larger whole can be thought of as a container that holds the source. For example, a short story may be contained in an anthology. The short story is the source, and the anthology is the container.