Gaya APA
Ships' Routeing Sixth 1991 Edition. (1991).
London:
International Maritime Organization.
Gaya Chicago
Ships' Routeing Sixth 1991 Edition.
.
London:
International Maritime Organization,
1991.
Text.
Gaya MLA
Ships' Routeing Sixth 1991 Edition.
.
London:
International Maritime Organization,
1991.
Text.
Gaya Turabian
Ships' Routeing Sixth 1991 Edition.
London:
International Maritime Organization,
1991.
Print.