APA-ийн эшлэл(7 дахь хэвлэлт)

George Allen & Unwin Ltd. (1994). How things work: The universal encyclopedia of Machines Vol. II. Harper Collins Publications.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

George Allen & Unwin Ltd. How Things Work: The Universal Encyclopedia of Machines Vol. II. New delhi: Harper Collins Publications, 1994.

MLA -ийн эшлэл (9 дэх хэвлэлт)

George Allen & Unwin Ltd. How Things Work: The Universal Encyclopedia of Machines Vol. II. Harper Collins Publications, 1994.