Greff, G., & Kruse, J. P. (1999). Das ABC des Call-Center-Management: Die wichtigsten Fachbegriffe rund um Call-Center, Telemarketing und Kundenservice. Gabler.
Chicago Style (17th ed.) CitationGreff, Günter, and Jan Peter Kruse. Das ABC Des Call-Center-Management: Die Wichtigsten Fachbegriffe Rund Um Call-Center, Telemarketing Und Kundenservice. Wiesbaden: Gabler, 1999.
MLA (9th ed.) CitationGreff, Günter, and Jan Peter Kruse. Das ABC Des Call-Center-Management: Die Wichtigsten Fachbegriffe Rund Um Call-Center, Telemarketing Und Kundenservice. Gabler, 1999.
Warning: These citations may not always be 100% accurate.