Gaya APA

Varisco, D, M. (1994). Medieval agriculture and Islamic science: the almanac of a Yemeni Sultan / Daniel MArtin Varisco . : University of Washington Press.

Gaya MLA

Varisco, Daniel, Martin. "Medieval agriculture and Islamic science: the almanac of a Yemeni Sultan / Daniel MArtin Varisco". : University of Washington Press, 1994. Referensi.