@book{Baumann+Wagner+2020,
url = {https://doi.org/10.3790/9783896445551},
title = {Einstieg in die Marktforschung},
title = {},
author = {Axel BaumannGabriele Wagner},
publisher = {Verlag Wissenschaft & Praxis},
address = {},
doi = {doi:10.3790/9783896445551},
isbn = {9783896445551},
year = {2010},
lastchecked = {2020}
}