APA引文

Spyri, J. (2010). Heidi. Project Gutenberg.

Chicago Style (17th ed.) Citation

Spyri, Johanna. Heidi. To be supplied: Project Gutenberg, 2010.

MLA引文

Spyri, Johanna. Heidi. Project Gutenberg, 2010.

警告：這些引文格式不一定是100％准確.