Trimble, V. (1991). Visit to a small universe. The American Institute of Physics.
Citazione stile Chigago Style (17a edizione)Trimble, Virginia. Visit to a Small Universe. New York: The American Institute of Physics, 1991.
Citatione MLA (9a ed.)Trimble, Virginia. Visit to a Small Universe. The American Institute of Physics, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.