National Industrial Conference Board. (1940). The Economic almanac for .. National Industrial Conference Board.
Chicago-viite (17. p.)National Industrial Conference Board. The Economic Almanac for .. New York City: National Industrial Conference Board, 1940.
MLA-viite (8. p.)National Industrial Conference Board. The Economic Almanac for .. National Industrial Conference Board, 1940.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.