APA (7th ed.) Citation

Heer, F., & Sondheimer, J. (1962). The medieval world: Europe, 1100-1350. World Pub.

Chicago Style (17th ed.) Citation

Heer, Friedrich, and Janet Sondheimer. The Medieval World: Europe, 1100-1350. Cleveland: World Pub, 1962.

MLA (9th ed.) Citation

Heer, Friedrich, and Janet Sondheimer. The Medieval World: Europe, 1100-1350. World Pub, 1962.

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