Turtledove, H. (2002). Counting up, counting down (first.). Ballantine books.
Cita Chicago Style (17a ed.)Turtledove, Harry. Counting Up, Counting Down. first. New York: Ballantine books, 2002.
Cita MLA (9a ed.)Turtledove, Harry. Counting Up, Counting Down. first. Ballantine books, 2002.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.