APA Style
Spyri, Johanna. ().
The Story of Heidi .
:
Usborne.
Chicago Style
Spyri, Johanna.
The Story of Heidi.
:
Usborne,
.
Text.
MLA Style
Spyri, Johanna.
The Story of Heidi.
:
Usborne,
.
Text.
Turabian Style
Spyri, Johanna.
The Story of Heidi.
:
Usborne,
.
Print.