Frison-Roche, Roger
Bruxelles Zurich Monreal, 1981
Buku Teks
Lambirth, Andrew
Learning Matters, 2005
Buku Teks
Watt, William W. (William Whyte)
Holt, Rinehart and Winston, 1961
Koleksi Publik
Watt, William W. (William Whyte)
Holt, Rinehart and Winston, 1961
Koleksi Publik
edited by John L. Bradley and Martin Stevens
Rinehart and Winston, 1968
Buku Teks