Macaulay, D. (1975). Pyramid. Houghton Mifflin Company.
Cita Chicago (17th ed.)Macaulay, David. Pyramid. Boston: Houghton Mifflin Company, 1975.
Cita MLA (9th ed.)Macaulay, David. Pyramid. Houghton Mifflin Company, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.