Langner, M. C. (1967). The National Library of Medicine's Services: Initial Observations on Indexing, Interlibrary Loan, and Reference.
استشهاد بنمط شيكاغوLangner, Mildred Crowe. The National Library of Medicine's Services: Initial Observations On Indexing, Interlibrary Loan, and Reference. 1967.
MLA استشهادLangner, Mildred Crowe. The National Library of Medicine's Services: Initial Observations On Indexing, Interlibrary Loan, and Reference. 1967.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.