Duff, Alistair S., author
Routledge, 2000
Buku Teks
Abrizah Abdullah... (et al.)
University of Malaya, 2007
Buku Teks
edited by C.J. Armstrong
Gower, 1990
Buku Referensi
Taylor, Arlene G., author
Libraries Unlimited, Inc., 1999
Buku Teks
Pintar, Judith, author
Routledge, 2023
Buku Teks