Readings in the regulation of business / edited, Sidney M. Blumner, Dennis L. Hefner
International Textbook Company, 1968
 Buku Teks
Dougan, Dennis L.
Book-keeping and accountants for elementary and intermendiate students Dennis L. Dougan
London Sweet & Maxwell, Limited 1951,
 Buku Teks
Foster, Dennis L., author
Rooms at the Inn : front office operations and administration/ Foster Dennis L.,
McGraw-Hill, 1992
 Buku Teks
Dougan, Dennis L.
Book-keeping and accounts for elementary and intermediate students / by Dennis L. Dougan
Sweet & Maxwell , 1951
 Buku Teks
Netter's infectious diseases /edited by Elaine C. Jong, Dennis L. Stevens
Elsevier Saunders, 2012
 Buku Teks
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