Halko, J. (1950). A study and analysis of selected data including population, age, occupation, education, and housing for Langston Terrace: For the purpose of giving aid in relocating People's Congregational Church. Dept. of Research and Planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Halko, John. A Study and Analysis of Selected Data Including Population, Age, Occupation, Education, and Housing for Langston Terrace: For the Purpose of Giving Aid in Relocating People's Congregational Church. Washington, D.C.: Dept. of Research and Planning, 1950.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Halko, John. A Study and Analysis of Selected Data Including Population, Age, Occupation, Education, and Housing for Langston Terrace: For the Purpose of Giving Aid in Relocating People's Congregational Church. Dept. of Research and Planning, 1950.