nasa.gov
Reference materials
a topographic map of the area
The relevant service manual for that aircraft.
Mimi A. Stankowich has written: 'Learning to use reference material'
special reference material
See the link below for U.S. rules.
References can be noted at the end of the page or in the index bibliography if the reference material is published as a book or some journal /magazine - other wise you cannot give self reference to your own article.
You need to include some kind of reference on any memorandum so that the memo can be later quickly identified as relating to other material.
You keep the MSDS with or near the hazardous material it describes so it will be available for reference if there is a leak, spill or other form of exposure.
Geologists reference a material's density in reference to it's weight. Density is the material's weight divided by the weight of an equal volume of water.
The index of a reference book is typically located at the end of the book, after the main content and possibly after the bibliography or other supplementary material.