David Yallop

Nebraska-Lincoln. [22 September 2020]. （原始内容存档于2006-07-11）.  David W. Hughes; B.D. Yallop; C.Y. Hohenkerk. The Equation of Time. Monthly Notices of the

Colin Yallop and Janet Fletcher (2007). An Introduction to Phonetics and Phonology. Blackwell Publishing. ISBN 1-4051-3083-0. Howard, David M.; Jamie

若望保禄一世给人留下最深刻的印象就是他的亲切。但是，有报道说，在梵蒂冈城中，他被认为是一个聪明但是不能胜任教宗职责的人，尽管英国作家大卫·耶洛普（英语：David Yallop）（在他的书“In God's Name"中）说这是梵蒂冈内反对若望保禄一世政策的人暗中对他污蔑的结果。John

Revolution of the Earth. [2013-11-22]. （原始内容存档于2020-11-27）.  Hohenkerk, C.Y., Yallop, B.D., Smith, C.A., & Sinclair, A.T. "Celestial Reference Systems" in Seidelmann

1.3 (13): 91–96 [2019-04-22]. （原始内容存档 (PDF)于2018-12-23）.  Clark John, Yallop Collin, Fletcher Janet. Introduction to Phonetics and Phonology. Oxford: