APA
Bernhardt Rudolf,, . (1990). Encyclopedia of public international law. Vol.XII : Geographic issues. Amsterdam: North - Holland Publishing Co.
Chicago
Bernhardt Rudolf,, . 1990. Encyclopedia of public international law. Vol.XII : Geographic issues. Amsterdam: North - Holland Publishing Co.
Harvard
Bernhardt Rudolf,, . (1990). Encyclopedia of public international law. Vol.XII : Geographic issues. Amsterdam: North - Holland Publishing Co.
MLA
Bernhardt Rudolf,, . Encyclopedia of public international law. Vol.XII : Geographic issues. Amsterdam: North - Holland Publishing Co. 1990.