The issue number of the Postbag, found at the top. Do not include "Postbag ", supply only a number.
The (NPC) author of the response.
This is for specifying the number of the letter being cited. This field contains no formatting, therefore type exactly what you wish to appear. For example, the first letter and its reply are "Letter 1", the second is "Letter 2", and so on. It may also be necessary to use "Introduction", "Wise Old Jokes" or other descriptors to cover information which is outside of a normal letter and reply format.
The following parameters are standard across all citation templates.
Optional. This parameter allows you to add text beginning one space after the end of the citation. Having no formatting (meaning you will have to format it yourself), this area can be used for anything you require.
Optional. If you want to use this reference more than once, you must name it the first time you use it, then whenever you want to use it again, addwherever you want it to re-appear.
Optional. This can be used to put the reference into a specific group, to separate it from other types of reference. See here for more on reference groups.