Brochure, pamphlet or leaflet
(refer Snooks, p. 196-7, 201)
If date is uncertain place a ? after the date. If the date is unknown use the abbreviation n.d. in place of a date. Also provide a descripton of the document type in normal typeface after the title, e.g. pamphlet.
In-Text: (Abbott Diabetes Care 2009?)
References: Abbott Diabetes Care 2009?, What is diabetes?, pamphlet, Abbott Diabetes Care, Doncaster, Vic.
If you cannot find an example for what you are looking for then use: Chapter 12 'Methods of citations' from Snooks (2002)