@misc{MARUDA_Krzysztof_Search_2012-06-01,
 author={MARUDA Krzysztof and SOŁODUCHA Krzysztof},
 howpublished={online},
 year={2012-06-01},
 title={Search engine marketing or social media marketing – goals and tasks – comparision attempt},
 doi={10.5604/18969380.1159260},
}