(1991). In space (How things work). Alexandria, Virginia: Time-Life Books.
Trích dẫn kiểu ChicagoIn Space (How Things Work). Alexandria, Virginia: Time-Life Books, 1991.
Deismireacht MLAIn Space (How Things Work). Alexandria, Virginia: Time-Life Books, 1991.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.