This is a guide for students, tutors and authors who have to write assignments, articles and other publications, but are not familiar with correct methods of acknowledging indebtedness for information taken from other sources, referring to other parts of the work being written, or of providing additional explanation or discussion to supplement their work. Three methods and their styles are discussed: the Harvard method, the augmented Harvard method and the running notes method, since these three methods are in common use. Examples are given of each method.