APA Style
Shields, Amy. ().
National Geographic Kids: Trains .
:
.
Chicago Style
Shields, Amy.
National Geographic Kids: Trains.
:
,
.
Text.
MLA Style
Shields, Amy.
National Geographic Kids: Trains.
:
,
.
Text.
Turabian Style
Shields, Amy.
National Geographic Kids: Trains.
:
,
.
Print.