Dittman, H. (2000). Learn library of congress classification: Library basics. Lanham, Maryland: Scarecrow Press.
استشهاد بنمط شيكاغوDittman, Helena. Learn Library of Congress Classification: Library Basics. Lanham, Maryland: Scarecrow Press, 2000.
MLA استشهادDittman, Helena. Learn Library of Congress Classification: Library Basics. Lanham, Maryland: Scarecrow Press, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.