APA (7e ed.) Bronvermelding
Heiken, G., Funiciello, R., & De Rita, D. (2005). The seven hills of Rome: A geological tour of the eternal city. Princeton University Press.
Chicago (17e ed.) Bronvermelding
Heiken, Grant, R. Funiciello, en Donatella De Rita. The Seven Hills of Rome: A Geological Tour of the Eternal City. Princeton: Princeton University Press, 2005.
MLA (9e ed.) Bronvermelding
Heiken, Grant, et al. The Seven Hills of Rome: A Geological Tour of the Eternal City. Princeton University Press, 2005.
Let op: Deze citaties zijn niet altijd 100% accuraat.