@book { CommunicatingtheEnvironment,
    title = "Communicating the Environment",
    subtitle = "Environmental Communication for Sustainable Development",
    author = "Manfred {Oepen} and Winfried {Hamacher}",
    year = "2000",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1090536"
}