Gaya APA
Bernhard Grzimek, Neil Schlager, American Zoo and Aquarium Association. ().
Grzimek's Animal Life Encyclopedia, 2nd Edition, Volume 8: Birds I [2 ed.] .
:
.
Gaya Chicago
Bernhard Grzimek, Neil Schlager, American Zoo and Aquarium Association.
Grzimek's Animal Life Encyclopedia, 2nd Edition, Volume 8: Birds I [2 ed.].
:
,
.
Ekonomi Pertanian.
Gaya MLA
Bernhard Grzimek, Neil Schlager, American Zoo and Aquarium Association.
Grzimek's Animal Life Encyclopedia, 2nd Edition, Volume 8: Birds I [2 ed.].
:
,
.
Ekonomi Pertanian.
Gaya Turabian
Bernhard Grzimek, Neil Schlager, American Zoo and Aquarium Association.
Grzimek's Animal Life Encyclopedia, 2nd Edition, Volume 8: Birds I [2 ed.].
:
,
.
Ekonomi Pertanian.