The abbreviation n.d. is used to denote that no date is offered:
Chatham (n.d.) has claimed……
or indirectly:
Earlier research (Chatham, n.d.) suggested that……
The abbreviation n.d. is used to denote that no date is offered:
Chatham (n.d.) has claimed……
or indirectly:
Earlier research (Chatham, n.d.) suggested that……