United States. National Aeronautics and Space Administration. Technology Utilization Division. (1968). Seals and sealing techniques: A compilation. [For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va.].
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. National Aeronautics and Space Administration. Technology Utilization Division. Seals and Sealing Techniques: A Compilation. Washington: [For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va.], 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)United States. National Aeronautics and Space Administration. Technology Utilization Division. Seals and Sealing Techniques: A Compilation. [For sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va.], 1968.