edited by Paul Boreham, Geoffrey Stokes and Richard Hall
Pearson-Longman, 2004
Buku Teks SO
Eulau, Heinz
Feffer and Simons, 1963
Buku Teks SO
editor by, Joyce Apsel, Amy Sodaro
Routledge, 2020
Buku Teks SO
Killen, James
Port Melbourne, 1985
Buku Teks SO
edited by Henry Mayer
F.W. Chesire, 1966
Buku Teks SO