Complete multivolume-work:
(Editor or author, year)
Example: (Gauglitz & Moore, 2014)
Note: Some multi-volumed works have different authors or editors for each volume. Refer to the editor of the volume you have used.
Author or Editor. (Ed.). (year–year). Title in italics (Edition, number of volumes). Publisher.
Example:
Gauglitz, G., & Moore, D. S. (Eds.). (2014). Handbook of spectroscopy (2nd ed., Vol. 1-4). Wiley.
Author. (Year). Title of the whole work: Volume: Title of volume (edition). Publisher.
Example:
Norwegian-American Historical Association. (2016). From America to Norway : Norwegian-American immigrant letters, 1838-1914: Vol. 3: 1893–1914. Norwegian-American Historical Association University of Minnesota Press.
Author. (Year). Title of the whole work (edition, volume). Publisher.
Example:
Gauglitz, G., & Vo-Dinh, T. (2003). Handbook of spectroscopy (Vol. 2). Wiley.
Note: If all volumes have been published the same year, you only write that year.
Add as Edited book or Book.
Fill in the fields: Editor, Year, Title, Edition*, Publisher.
Note: *Not when 1st edition.
Add as Book.
Fill in the fields: Title, Author (include both editor and author), Volume (if you enter one volume of a multi-volume work), Edition*, Publisher, Date.
Note: *Not when 1st edition.
Remember to check if the volume you’re using has an individual title. If the book has an own title and a volume number, you must include them.
If you’re refering to a complete multi-volume work, you need to include the publishing years of all volumes (e.g. 2003-2006).
Did you check if the volume has one or more editors? Remember to include all editors, even if only the last one has a (red.) or (ed.) behind their name.