APA (7th ed.) Citation

(1993). The World of learning 1993 (43rd.). Europa Publications.

Chicago Style (17th ed.) Citation

The World of Learning 1993. 43rd. London: Europa Publications, 1993.

MLA (9th ed.) Citation

The World of Learning 1993. 43rd. Europa Publications, 1993.

Warning: These citations may not always be 100% accurate.