Cita APA (7a ed.)

(1994). The WORLD of learning 1994 (44th.ed.). Europa Publications Limited.

Cita Chicago Style (17a ed.)

The WORLD of Learning 1994. 44th.ed. London: Europa Publications Limited, 1994.

Cita MLA (8a ed.)

The WORLD of Learning 1994. 44th.ed. Europa Publications Limited, 1994.