Gaya APA
Sutrisno...dkk, D., Kirschbaum, K. (1981).
International yearbook of cartography 1981 .
Bonn:
Kirscbaum Verlag.
Gaya MLA
Sutrisno...dkk, Dewayani., Kirschbaum, Klaus.
"International yearbook of cartography 1981".
Bonn:
Kirscbaum Verlag,
1981.
Text.