Schumburg, G. J. (1999). Dutch standards and guide lines for MBA in the 90s and beyond. s.n.].
Lua i Stíl Chicago (17ú heag.)Schumburg, Gunther John. Dutch Standards and Guide Lines for MBA in the 90s and Beyond. [S.l.: s.n.], 1999.
Lua MLA (8ú heag.)Schumburg, Gunther John. Dutch Standards and Guide Lines for MBA in the 90s and Beyond. s.n.], 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.