APA
World Of Learning, . (1974). The world of learning ,1974-75, Vol 2. London: Europa Publication.
Chicago
World Of Learning, . 1974. The world of learning ,1974-75, Vol 2. London: Europa Publication.
Harvard
World Of Learning, . (1974). The world of learning ,1974-75, Vol 2. London: Europa Publication.
MLA
World Of Learning, . The world of learning ,1974-75, Vol 2. London: Europa Publication. 1974.