APA (7th ed.) Citation

(1970). The world of learning (20. ed.). Europa Publ.

Chicago Style (17th ed.) Citation

The World of Learning. 20. ed. London: Europa Publ, 1970.

MLA (9th ed.) Citation

The World of Learning. 20. ed. Europa Publ, 1970.

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