Gaya APA
Eco, U, &, M, C, , (. (1989).
On the medieval theory of signs. Foundations of Semiotics, 21 .
Amsterdam dsl:
Amsterdam dsl John Benjamin Publ Co.
Gaya MLA
Eco, Umberto, &, Marmo,, Costantino, , (ed.).
"On the medieval theory of signs. Foundations of Semiotics, 21".
Amsterdam dsl:
Amsterdam dsl John Benjamin Publ Co,
1989.
Buku.