(1969). Festschrift Ludwig Petry. Geschichtliche Landeskunde.
Chicago Style (17th ed.) Citation"Festschrift Ludwig Petry." Geschichtliche Landeskunde 1969.
MLA (8th ed.) Citation"Festschrift Ludwig Petry." Geschichtliche Landeskunde, 1969.
Warning: These citations may not always be 100% accurate.