Heyn, I. Archivmaterialien zu Immanuel Heyn, 1859-1918.
Chicago Style (17th ed.) CitationHeyn, Immanuel. Archivmaterialien Zu Immanuel Heyn, 1859-1918.
MLA引文Heyn, Immanuel. Archivmaterialien Zu Immanuel Heyn, 1859-1918.
警告：這些引文格式不一定是100％准確.
APA引文