Pennsylvania Dutch language (English Wikipedia)

Huffines, Marion Lois (1991). "Acquisition Strategies in Language Death". Studies in Second Language Acquisition. 13 (1): 43–55. doi:10.1017/S0272263100009712. ISSN 0272-2631. JSTOR 44487534. S2CID 143488878.
Wood, Ralph Charles (1945). "Pennsylvania "High German"". The Germanic Review: Literature, Culture, Theory. 20 (4): 299–314. doi:10.1080/19306962.1945.11786250. Retrieved May 1, 2024.
Wood, Ralph Charles (1945). "Pennsylvania "High German"". The Germanic Review: Literature, Culture, Theory. 20 (4): 299–314. doi:10.1080/19306962.1945.11786250. Retrieved May 1, 2024.

gameo.org

2016 American Community Survey, 5-year estimates (https://usa.ipums.org/usa/sda/)

Huffines, Marion Lois (1991). "Acquisition Strategies in Language Death". Studies in Second Language Acquisition. 13 (1): 43–55. doi:10.1017/S0272263100009712. ISSN 0272-2631. JSTOR 44487534. S2CID 143488878.
Fuller, Janet M. (1999). "The Role of English in Pennsylvania German Development: Best Supporting Actress?". American Speech. 74 (1): 38–55. ISSN 0003-1283. JSTOR 455747.

Keiser, Steve Hartman (1999). "A Plain Difference: Variation in Case-Marking in a Pennsylvania German Speaking Community" (PDF). OSU Working Papers in Linguistics. 52. Ohio State University: 249–288. Retrieved February 26, 2022.

Huffines, Marion Lois (1991). "Acquisition Strategies in Language Death". Studies in Second Language Acquisition. 13 (1): 43–55. doi:10.1017/S0272263100009712. ISSN 0272-2631. JSTOR 44487534. S2CID 143488878.

Wood, Ralph Charles (1945). "Pennsylvania "High German"". The Germanic Review: Literature, Culture, Theory. 20 (4): 299–314. doi:10.1080/19306962.1945.11786250. Retrieved May 1, 2024.
Wood, Ralph Charles (1945). "Pennsylvania "High German"". The Germanic Review: Literature, Culture, Theory. 20 (4): 299–314. doi:10.1080/19306962.1945.11786250. Retrieved May 1, 2024.

Mark Scolforo (August 20, 2008). "Amish population nearly doubles in 16 years". USA Today. Associated Press. Retrieved February 3, 2011.

Huffines, Marion Lois (1991). "Acquisition Strategies in Language Death". Studies in Second Language Acquisition. 13 (1): 43–55. doi:10.1017/S0272263100009712. ISSN 0272-2631. JSTOR 44487534. S2CID 143488878.
Fuller, Janet M. (1999). "The Role of English in Pennsylvania German Development: Best Supporting Actress?". American Speech. 74 (1): 38–55. ISSN 0003-1283. JSTOR 455747.