APA (7th ed.) Citation

Turtledove, H. (2002). Counting up, counting down (first.). Ballantine books.

Chicago Style (17th ed.) Citation

Turtledove, Harry. Counting Up, Counting Down. first. New York: Ballantine books, 2002.

MLA (9th ed.) Citation

Turtledove, Harry. Counting Up, Counting Down. first. Ballantine books, 2002.

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