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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mark, Beth Hostetler, و 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.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Mark, Beth Hostetler, و 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.