Franve, Boyd
Washington, D.C. |Natiional Planning Ass. 1961,
Buku Teks
La Documentation , 1996
Buku Teks
Brame, Genevieve
Kogan Page, 2004
Buku Referensi
Larousse, 2005
Buku Referensi
Spengler, Joseph J. (Joseph John), 1902-1991
Duke Univrsity Press, 1979
Buku Teks