APA style for publication date

I found some important information about publication date.
for papers and posters presened a meetings, give the year and month of the meeting, seperated by a comma and enclosed in parentheses.
write in press in parentheses for atricles that have been accepted for publication but that have not yet been published.Do not give a date until the articles has actually been published .
if  no date is available, write n.d in parentheses.
for severaes volume in a multivolume work or several letters from the same collection , express the date as a range of years from earliest to latest.
for archival sources,indicate an estimated date that is reasonably certain but not started on the document by using ca.(circa)and enclose the information in square brackets.
finish the element with a period after the closing parenthesis.