Norberg-Schultz, Christian, author
Monacelli Press, 1997
Buku Teks
Pareto, Vilfredo, author
Frederick A. Praeger, 1966
Buku Teks
edited by William R. Spriegel and Clark E. Myers
R.D. Irwin, 1953
Buku Teks
Muhammad Amin A. Samad, author
Ghazella, 2010
Buku Teks
José Rizal National Centennial Commission,, 1962.
Buku Teks