Legal restrictions on hours of work in the United States;
a reference manual ...

APA Citation

National Industrial Conference Board. (1924). Legal restrictions on hours of work in the United States: a reference manual ... New York: National industrial conference board.

MLA Citation

National Industrial Conference Board. Legal Restrictions On Hours of Work In the United States: a Reference Manual ... New York: National industrial conference board, 1924.

Warning: These citations may not always be complete (especially for serials).