APA
Blishen E., Cook C., . (1979). Pears guide to today's world. London: Pelham.
Chicago
Blishen E, Cook C, . 1979. Pears guide to today's world. London: Pelham.
Harvard
Blishen E., Cook C., . (1979). Pears guide to today's world. London: Pelham.
MLA
Blishen E, Cook C, . Pears guide to today's world. London: Pelham. 1979.