The value of the format can be determined by verifying the following aspects of the ready reference sources.
Size: Ready reference sources are usually single volume tools. Some handbooks are available in multi volumes. They should be handy.
Typography: The size and style of the type faces should be clear and legible. The proper spacing between the words, letters and lines and layout of the columns improve the readability of the sources. The difference between the headings and sub-headings by using the bold letters or different sizes of the letters facilitate the usability of the sources.
Paper: Good quality papers should be used for durability. Thin and opaque papers reduce the weight and make the size of the source handy.
Binding: Binding should be of leather, rexin or calico cover and should be light but strong enough to withstand heavy and rough use.
Physical Appearance: The physical appearance should be appealing, functional and pleasing with golden or ink print lettering.