Mark, B. H., & Osborne, A. S. (2014). Worthy of the calling: Biographies of Paul and Lela Hostetler, Harvey and Erma Sider, Luke Jr. and Doris Keefer. Brethren in Christ Historical Society.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিMark, Beth Hostetler, এবং AnnaRuth Sider Osborne. Worthy of the Calling: Biographies of Paul and Lela Hostetler, Harvey and Erma Sider, Luke Jr. and Doris Keefer. Mechanisburg, PA: Brethren in Christ Historical Society, 2014.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিMark, Beth Hostetler, এবং AnnaRuth Sider Osborne. Worthy of the Calling: Biographies of Paul and Lela Hostetler, Harvey and Erma Sider, Luke Jr. and Doris Keefer. Brethren in Christ Historical Society, 2014.
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