Bird, D. (2003). Sabbath challenge, sabbath delight! Xulan Press.
Cita Chicago (17th ed.)Bird, David. Sabbath Challenge, Sabbath Delight! Xulan Press, 2003.
Cita MLA (9th ed.)Bird, David. Sabbath Challenge, Sabbath Delight! Xulan Press, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.