Gaya APA
Oppenheim, L., Lauterpacht, H.
(1955).
International law
(
8 th ed)
.
London:
Longmans.
Gaya MLA
Oppenheim, L.., Lauterpacht, H..
"International law".
8 th ed
London:
Longmans,
1955.
Buku.