Gaya APA
The Indonesian Jounal of Geography Vol. 16 No.52 Desember 1986
.
().
Yogyakarta, Indonesia:
Gadjah Mada University.
Gaya MLA
The Indonesian Jounal of Geography Vol. 16 No.52 Desember 1986
.
.
Yogyakarta, Indonesia:
Gadjah Mada University,
.
.