@book { ImportantLeadershipTheoriesintheRealmofManagementSciences,
    title = "Important Leadership Theories in the Realm of Management Sciences",
    author = "Arghya {Ray}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656203537",
    url = "https://www.hausarbeiten.de/document/194720"
}