Works that cannot be retrieved by readers are cited in the text as a personal communication.
Personal communications include:
A personal communication is cited only in the text, because the source of the information is cannot be traced by the reader.
Provide initials and surname (in that order) of the person you are citing, and give the exact date (Month Day, Year).
If a document is available online but only accessible after logging in (e.g. intranet), the information is only available to a limited number of people. First consider whether the content of the document is confidential, if so, refer to it as a personal communication.
If it is general information, and the reader or reviewer has access to the information behind the login, for example journal articles or documents on OnderwijsOnline or Teams, provide an entry with URL in the reference list. If the work cannot be accessed, choose to refer to it as a personal communication.
The results of one's own research, as well as the complete research report, are considered 'own work'. The source(s) do need not be mentioned, not in the text and not in the reference list, not even personal communication.
Example
A student conducts research within an organisation on improving the quality of care. For this purpose, the student interviews a number of patients, a number of employees and a number of experts.
In the description of the research, these persons are named (anonymously), including the period and circumstances during which the research took place. If these persons are quoted or paraphrased (individually or as a group) there is therefore no need for a separate reference in the text.
Avoid mentioning names, positions or other characteristics that enable to recognise participants in the study.