Gaya APA
Spyri, Johanna. (1998).
Heidi .
:
Wordsworth Editions.
Gaya Chicago
Spyri, Johanna.
Heidi.
:
Wordsworth Editions,
1998.
Text.
Gaya MLA
Spyri, Johanna.
Heidi.
:
Wordsworth Editions,
1998.
Text.
Gaya Turabian
Spyri, Johanna.
Heidi.
:
Wordsworth Editions,
1998.
Print.