Macherey, M. H., & Richards, J. N. (1932). Pyramids illustrated: A comprehensive manual for class use and exhibition purposes by Mathias H. Macherey and John N. Richards. A. S. Barnes.
Lua i Stíl Chicago (17ú heag.)Macherey, Mathias H., agus John N. Richards. Pyramids Illustrated: A Comprehensive Manual for Class Use and Exhibition Purposes by Mathias H. Macherey and John N. Richards. New York: A. S. Barnes, 1932.
Lua MLA (9ú heag.)Macherey, Mathias H., agus John N. Richards. Pyramids Illustrated: A Comprehensive Manual for Class Use and Exhibition Purposes by Mathias H. Macherey and John N. Richards. A. S. Barnes, 1932.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.