George Allen & Unwin Ltd. (1994). How things work: The universal encyclopedia of Machines Vol. II. Harper Collins Publications.
Chicago Style (17. basım) AtıfGeorge Allen & Unwin Ltd. How Things Work: The Universal Encyclopedia of Machines Vol. II. New delhi: Harper Collins Publications, 1994.
MLA (9th ed.) AtıfGeorge Allen & Unwin Ltd. How Things Work: The Universal Encyclopedia of Machines Vol. II. Harper Collins Publications, 1994.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..