@book { IntroductiontoTravelJournalism,
    title = "Introduction to Travel Journalism",
    subtitle = "On the Road with Serious Intent",
    author = "John F. {Greenman}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    url = "https://www.peterlang.com/document/1109112"
}