Cabterbery, E. Ray
The making of economics / E. Ray Canterbery
Wadsworth, 1987
 Buku Teks
Baber, Ray E.
Marrige and the family / Ray E. Baber
McGraw-Hill, 1953
 Buku Teks
Ferhat Aziz
Synthesis and monte carlo simulation of improved concrete composites for enhanced x-ray/gamma ray radiation shielding
Faculty of Engineering, Universitas Indonesia, 2018
 Artikel Jurnal
Boissohneau, Alice
Eileen McCullough
Toronto Simon and Pierre 1983
 Buku Teks
Ray, George E.
Incorporating the Proferssional Practice / George E. Ray
Prentice-Hall, 1972
 Buku Teks