EUROPA PUBLICATIONS LIMITDE. (1986). The world of learning 1987 (ed.37.). Europa Publications limited.
Chicago-čujuhus (17. p.)EUROPA PUBLICATIONS LIMITDE. The World of Learning 1987. ed.37. London: Europa Publications limited, 1986.
MLA-čujuhus (9. p.)EUROPA PUBLICATIONS LIMITDE. The World of Learning 1987. ed.37. Europa Publications limited, 1986.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.