APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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