APA Style
Spyri, Johanna. (2006).
Heidi .
New York:
Sterling.
Chicago Style
Spyri, Johanna.
Heidi.
New York:
Sterling,
2006.
Text.
MLA Style
Spyri, Johanna.
Heidi.
New York:
Sterling,
2006.
Text.
Turabian Style
Spyri, Johanna.
Heidi.
New York:
Sterling,
2006.
Print.