EUROPA PUBLICATIONS LIMITDE. (1987). The world of learning 1988 (ed.38.). Europa Publications limited.
Chicago-čujuhus (17. p.)EUROPA PUBLICATIONS LIMITDE. The World of Learning 1988. ed.38. London: Europa Publications limited, 1987.
MLA-čujuhus (9. p.)EUROPA PUBLICATIONS LIMITDE. The World of Learning 1988. ed.38. Europa Publications limited, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.