Cita APA (7a ed.)
Duston, A., & Nesselrath, A. The invisible made invisible: Angels from the Vatican / Allen Duston, O. P., and Arnold Nesselrath.
Cita Chicago Style (17a ed.)
Duston, Allen, 与 Arnold Nesselrath. The Invisible Made Invisible: Angels from the Vatican / Allen Duston, O. P., and Arnold Nesselrath.
Cita MLA (9a ed.)
Duston, Allen, 与 Arnold Nesselrath. The Invisible Made Invisible: Angels from the Vatican / Allen Duston, O. P., and Arnold Nesselrath.
警告：这些引文格式不一定是100％准确.