Macaulay, D. (1975). Pyramid. Houghton Mifflin Company.
Dyfyniad Arddull ChicagoMacaulay, David. Pyramid. Boston: Houghton Mifflin Company, 1975.
Dyfyniad MLAMacaulay, David. Pyramid. Houghton Mifflin Company, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.