APA Style
Spyri, Johanna. (1994).
Heidi .
United Kingdom:
Ladybird.
Chicago Style
Spyri, Johanna.
Heidi.
United Kingdom:
Ladybird,
1994.
.
MLA Style
Spyri, Johanna.
Heidi.
United Kingdom:
Ladybird,
1994.
.
Turabian Style
Spyri, Johanna.
Heidi.
United Kingdom:
Ladybird,
1994.
.