@book { SocialMediaMarketinginderHeimtierbranche, title = "Social-Media Marketing in der Heimtierbranche", author = "Matthias {Wiesensee}", year = "2010", publisher = "Diplom.de", address = "Hamburg, Deutschland", doi = "10.3239/9783842805163", url = "https://m.diplom.de/document/228074" }