Harvard Style Guide: No date of publication

Reference: First author Last name, Initials, second author Last name, Initials and third author Last name, Initials. (n.d.) Title. Edition. Place of publication: Publisher.

Example: Shalloway, A., Murphy T. and Trott, J. (n.d.) Design patterns explained: a new perspective on object-oriented design. 3rd edn. London: Addison Wesley.

In-Text-Citation:

• First author Last name, second author last name and third author Last name (no date)
• (First author Last name, second author last name and third author Last name, no date)

Example:

• Shalloway, Murphy and Trott (no date) suggest that…..
• It has been suggested (Shalloway, Murphy and Trott, no date)

Still unsure what in-text citation and referencing mean? Check here. 

Still unsure why you need to reference all this information? Check here.