Davis, G. W. (1986). The origin of the "to be" + preterite participle perfect periphrase in Germanic.
Chicago Style (17th ed.) CitationDavis, Garry W. The Origin of the "to Be" + Preterite Participle Perfect Periphrase in Germanic. 1986.
MLA (9th ed.) CitationDavis, Garry W. The Origin of the "to Be" + Preterite Participle Perfect Periphrase in Germanic. 1986.
Warning: These citations may not always be 100% accurate.