What should you do if you are trying to cite a source that does not have a publication date?

Select one:

a$.$ Write the name of the publisher instead of the date in the reference and in$-$text citations

b$.$ Write the title instead of the date in the reference and in$-$text citations

c$.$ Write the abbreviation n$.$d$.$ for $"$no date" in the reference and in$-$text citations

d$.$ Write the abbreviation y$.$u$.$ for "year unknown" in the reference and in$-$text citations