Trewartha, Glenn T., author
Gadjah Mada University Press, 1995
Buku Teks
Trewartha, Glenn T., author
Gadjah Mada University Press, 1995
Buku Teks
Frick, Heinz, author
Kanisius, 2008
Buku Teks
I Made Sandy, author
Fakultas Matematika dan Ilmu Pengetahuan Aalam, Universitas Indonesia , 1987
Buku Teks
Salemba Empat, 2010
Buku Teks