List the year for each source and separate the years with a commaand a space.
Recent research (Mulderig, 1993, 1995) confirms this effect.
Mulderig (1993, 1995) confirms this effect.
Copyright ©2001 The McGraw-Hill Companies. Any use is subject to the Terms of Use and Privacy Policy. McGraw-Hill Higher Education is one of the many fine businesses of
The McGraw-Hill Companies, Inc..