APA
Editor Helen Mary Petter, Oxford University Press, . (1948). Oxford Junior Encyclopaedia. London: London, Geoffrey Cumberlege.
Chicago
Editor Helen Mary Petter, Oxford University Press, . 1948. Oxford Junior Encyclopaedia. London: London, Geoffrey Cumberlege.
Harvard
Editor Helen Mary Petter, Oxford University Press, . (1948). Oxford Junior Encyclopaedia. London: London, Geoffrey Cumberlege.
MLA
Editor Helen Mary Petter, Oxford University Press, . Oxford Junior Encyclopaedia. London: London, Geoffrey Cumberlege. 1948.
