Schumburg, G. J. (1999). Dutch standards and guide lines for MBA in the 90s and beyond. s.n.].
Chicagoスタイル(17版)引用形式Schumburg, Gunther John. Dutch Standards and Guide Lines for MBA in the 90s and Beyond. [S.l.: s.n.], 1999.
MLA(8版)引用形式Schumburg, Gunther John. Dutch Standards and Guide Lines for MBA in the 90s and Beyond. s.n.], 1999.
警告: この引用は必ずしも正確ではありません.