Gaya APA

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

Gaya MLA

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