Peter, Laurence J., author
William Morrow, 1976
Buku Teks
general editor Norman Myers ; foreword by Gerald Durrell ; featuring an extra chapter by Oxfam
Gaia Books, 1994
Buku Teks
Brown, Lester R., author
Erlangga, 1982
Buku Teks
Cunningham, William P., author
McGraw-Hill, Higher Education, 2009
Buku Teks
Cunningham, William P., author
McGraw-Hill, 2002
Buku Teks