APA (7th ed.) Citation
(1971). The WORLD of learning: 1.970-71 (21a. ed.). Europa Publications Limited.
Chicago Style (17th ed.) Citation
The WORLD of Learning: 1.970-71. 21a. ed. England: Europa Publications Limited, 1971.
MLA (9th ed.) Citation
The WORLD of Learning: 1.970-71. 21a. ed. Europa Publications Limited, 1971.
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