Gaya APA

Brade-Birks, S, G., Frank, I, H. (NULL). Encyclopedia of general kownledge . London:: London: The English University Press; 1967.

Gaya MLA

Brade-Birks, S., Graham., Frank, I., Higenbottam,. "Encyclopedia of general kownledge". London:: London: The English University Press; 1967, NULL. Text.