Gaya APA
Dror, Yehezkel. (1971).
Design for policy sciences .
Amerika Serikat:
Elsevier.
Gaya Chicago
Dror, Yehezkel.
Design for policy sciences.
Amerika Serikat:
Elsevier,
1971.
Text.
Gaya MLA
Dror, Yehezkel.
Design for policy sciences.
Amerika Serikat:
Elsevier,
1971.
Text.
Gaya Turabian
Dror, Yehezkel.
Design for policy sciences.
Amerika Serikat:
Elsevier,
1971.
Print.