Dyfyniad APA

(1990). How things work: The brain. Alexandria, Virginia: Time-Life Books.

Dyfyniad Arddull Chicago

How Things Work: The Brain. Alexandria, Virginia: Time-Life Books, 1990.

Dyfyniad MLA

How Things Work: The Brain. Alexandria, Virginia: Time-Life Books, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.