M6-b Use a.m., p.m., no., $, BC, and AD only with specific numerals or dates.
Printed Page H-80
7:15 a.m.
10:30 p.m.
$172.18
or
$38
No. 18
or
no. 18 [item or issue number of a source]
72
BC
[before Christ]
72
BCE
[before the Common Era]
AD
378 [anno Domini]
378
CE
[Common Era]
Note:
AD
is placed before the date, not after it.