Reference provides the focus or the focal point from where one can validate the information or findings. Generally a in-depth study or the works of a person well-versed in the subject, the reference is an important requisite in any study. It may be in the form of a symbol, text or pictures. For works to be complete a proper record of references need to be mentioned.Guides as the term suggests is one that shows the path. Throwing light on the specific subjects, guides explain the different aspects of the particular topic or subject. The preparation of guides requires thorough knowledge about the topic. To be able to explain to someone or teach something a topic that the person is not familiar with needs in-depth knowledge and a good understanding of the subject. Guides provide the helping hand one needs to reach the destination rather than wasting time groping around in the dark.