Interview profile of business school alumnus Frank S. Ptak, retired chairman and CEO of Marmon Holdings Inc., a subsidiary of Berkshire Hathaway Inc.
"Alumnus Profile: DePaul Provided Foundation for CEO's Success, Frank S. Ptak, BUS '65, DHL '13,"
Business Exchange: Vol. 1
, Article 3.
Available at: https://via.library.depaul.edu/bx/vol1/iss11/3