Gaya APA

Caspar, R. (1989). Trying to answer questions: Fr. Robert Caspar and a group of Christians living in Tunisia. Studi arabo-islamici del PISAI, 3 . Rome: Rome PISAI.

Gaya MLA

Caspar, Robert. "Trying to answer questions: Fr. Robert Caspar and a group of Christians living in Tunisia. Studi arabo-islamici del PISAI, 3". Rome: Rome PISAI, 1989. Buku.