edited by Gerald W. Whitted
Pan American World Airways, 1971
Buku Referensi
edited by Gerald W. Whitted
Pan American World Airways, 1963
Buku Referensi
Snibbe, Patricia M., author
McGraw-Hill, 1999
Buku Teks
Kidron, Michael, author
Simon & Schuster, 1984
Buku Teks
Bhote, Keki R., author
American Management Association, 2004
eBooks