(1989). Hearing before the committee on science, space, and technology U.S. House of representatives. Washington: U. S. Government Office.
استشهاد بنمط شيكاغوHearing Before the Committee On Science, Space, and Technology U.S. House of Representatives. Washington: U. S. Government Office, 1989.
MLA استشهادHearing Before the Committee On Science, Space, and Technology U.S. House of Representatives. Washington: U. S. Government Office, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.