9.1.1 Bibliographic data 

All documents cited in the search report must be clearly identified by indicating the necessary bibliographic data. All citations in the search report normally comply with the recommendations in WIPO Standards ST.14 (for including references cited in patent documents), ST.3 (for two-letter codes) and ST.16 (for identifying different kinds of patent documents), but there can be exceptions where strictly adhering to them would entail a lot of extra work and cost and is not necessary to enable a document to be clearly and easily identified.