Federal Document Retrieval, Inc, & Sims, M. (1987). Directory of periodicals online: Indexed, abstracted and full text : update (2nd ed.). Federal Document Retrieval.
Chicago Style (17th ed.) CitationFederal Document Retrieval, Inc, and Maria Sims. Directory of Periodicals Online: Indexed, Abstracted and Full Text : Update. 2nd ed. [Washington, D.C.]: Federal Document Retrieval, 1987.
MLA (8th ed.) CitationFederal Document Retrieval, Inc, and Maria Sims. Directory of Periodicals Online: Indexed, Abstracted and Full Text : Update. 2nd ed. Federal Document Retrieval, 1987.
Warning: These citations may not always be 100% accurate.