BEEF

MLA

Beef. St. Paul, Minn: Penton Media, Inc., Penton Business Media, Inc. and their subsidiaries, .

APA

BEEF. St. Paul, Minn: Penton Media, Inc., Penton Business Media, Inc. and their subsidiaries.

Chicago

BEEF. St. Paul, Minn: Penton Media, Inc., Penton Business Media, Inc. and their subsidiaries.