Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.