@book { DerethologischeAnsatzinderEntwicklungspsychologie,
    title = "Der ethologische Ansatz in der Entwicklungspsychologie",
    author = "Constanze {Hahn}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640807628",
    url = "https://www.hausarbeiten.de/document/165164"
}