Willging, E. P., & Hatzfeld, H. (1968). Catholic serials of the nineteenth century in the United States: A descriptive bibliography and union list. First series in two volumes. Catholic University of America Press.
Chicago Style (17th ed.) CitationWillging, Eugene P., and Herta Hatzfeld. Catholic Serials of the Nineteenth Century in the United States: A Descriptive Bibliography and Union List. First Series in Two Volumes. Washington: Catholic University of America Press, 1968.
MLA (8th ed.) CitationWillging, Eugene P., and Herta Hatzfeld. Catholic Serials of the Nineteenth Century in the United States: A Descriptive Bibliography and Union List. First Series in Two Volumes. Catholic University of America Press, 1968.
Warning: These citations may not always be 100% accurate.