APA Style
O\'Brien, J., Holub, J.
(2007).
Who was marco polo?
(
cet 1)
.
USA:
Grosset & Dunlap.
MLA Style
O\'Brien, John., Holub, Joan.
"Who was marco polo?".
cet 1
USA:
Grosset & Dunlap,
2007.
Text.