Quinn, R. (2010). Earth Then and Now. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoQuinn, Robert. Earth Then and Now. Oxford: Oxford University Press, 2010.
ציטוט MLAQuinn, Robert. Earth Then and Now. Oxford: Oxford University Press, 2010.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.