Schumburg, G. J. (1999). Dutch standards and guide lines for MBA in the 90s and beyond. s.n.].
Čikaški stil citiranja (17. izdanje)Schumburg, Gunther John. Dutch Standards and Guide Lines for MBA in the 90s and Beyond. [S.l.: s.n.], 1999.
MLA način citiranja (8. izdanje)Schumburg, Gunther John. Dutch Standards and Guide Lines for MBA in the 90s and Beyond. s.n.], 1999.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.