Gaya APA
Guinness book of world records 1990. (1990).
tempaterbit:
penerbit.
Gaya Chicago
Guinness book of world records 1990.
Edisi.
tempaterbit:
penerbit,
1990.
Text.
Gaya MLA
Guinness book of world records 1990.
Edisi.
tempaterbit:
penerbit,
1990.
Text.
Gaya Turabian
Guinness book of world records 1990.
tempaterbit:
penerbit,
1990.
Print.