APA Style
Keeler, Barbara. (2013).
Ladders : Speak Out .
USA:
National Geographic Learning.
Chicago Style
Keeler, Barbara.
Ladders : Speak Out.
USA:
National Geographic Learning,
2013.
.
MLA Style
Keeler, Barbara.
Ladders : Speak Out.
USA:
National Geographic Learning,
2013.
.
Turabian Style
Keeler, Barbara.
Ladders : Speak Out.
USA:
National Geographic Learning,
2013.
.