Who's who in America.
APA Citation
Marquis, A. Nelson., Leonard, J. W. Who's who in America. Chicago: Marquis Who's Who [etc.].
MLA Citation
Marquis, Albert Nelson, -1943, and John W. Leonard. Who's Who In America. Chicago: Marquis Who's Who [etc.],
Warning: These citations may not always be complete (especially for serials).