APA (7th ed.) Citation

TurtledovelhHarry. A world of difference.

Chicago Style (17th ed.) Citation

TurtledovelhHarry. A World of Difference. LondonlbNew English Librarylc1990.

MLA (9th ed.) Citation

TurtledovelhHarry. A World of Difference.

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