There is evidence of active searching of the literature. Original sources only are used. Consistent format and complete citations appear throughout. All references are listed in the bibliography. Limited searching of the reference database is evident.
Citations are largely consistent and complete.
All references are listed in the bibliography. Some literature is included that is marginally relevant to the issue. Limited searching of the reference databases is evident. Citations are incomplete and formatting is inconsistent. Some references may be missing from the bibliographic listing.