@book{Serjeant1983,
author="Robert B. Serjeant and Ronald Lewcock",
title="The church (al-Qalis) of Sana'a and Ghumdan castle",
year="1983",
booktitle="Sana'a: An Arabian Islamic City",
editor="R.B. Serjeant",
publisher="World of Islam Festival Trust",
address="London",
pages="44-48",
type="chapter"
}