Rujukan Bethlehem Steel

  1. ↑ Larson, Erik (2003), The Devil in the White City: Murder, Magic, and Madness at the Fair That Changed America, New York, USA: Crown, ISBN 978-0-609-60844-9, p. 193.
  2. ↑ Davis (1877), "Bethlehem Iron Company", History of Northampton County, Pennsylvania, Philadelphia and Reading: Peter Fritts, Chapter XLV, p. 212–213
  3. ↑ Garn, Andrew (1999). Bethlehem Steel. Princeton Architectural Press. m/s. 14. ISBN 1-56898-197-X.