APA ציטוט

Spyri, J. (1980). Heidi. New York: Watermill press.

Trích dẫn kiểu Chicago

Spyri, Johanna. Heidi. New York: Watermill press, 1980.

ציטוט MLA

Spyri, Johanna. Heidi. New York: Watermill press, 1980.