Cita APA (7a ed.)

Grant, D. P. (1973). Two modes of information retrieval: A compact, bibliographic distinction between the question answering systems and literature searching systems. Council of Planning Librarians.

Cita Chicago Style (17a ed.)

Grant, Donald P. Two Modes of Information Retrieval: A Compact, Bibliographic Distinction Between the Question Answering Systems and Literature Searching Systems. Monticello, Ill: Council of Planning Librarians, 1973.

Cita MLA (9a ed.)

Grant, Donald P. Two Modes of Information Retrieval: A Compact, Bibliographic Distinction Between the Question Answering Systems and Literature Searching Systems. Council of Planning Librarians, 1973.