Gaya APA
Eco, U. (2006).
The island of the day before. Translated by William Weaver. : Isola del giorno prima. 1994 .
Orlando dll:
Orlando dll Harcourt.
Gaya MLA
Eco, Umberto.
"The island of the day before. Translated by William Weaver. : Isola del giorno prima. 1994 ".
Orlando dll:
Orlando dll Harcourt,
2006.
Buku.