Gaya APA
wahyudiyati, T. (1998).
Certifiction And Ecolabelling as mechanisme program : Perpectives on its performance .
:
Lembaga Administrasi Negara.
Gaya MLA
wahyudiyati, Tri.
"Certifiction And Ecolabelling as mechanisme program : Perpectives on its performance".
:
Lembaga Administrasi Negara,
1998.
Text.