APA
International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, Spyers-Duran P. & Gore D. (1972). Economics of approval plans: proceedings. Westport, Conn: Greenwood Press.
Chicago
International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, Spyers-Duran Peter and Gore Daniel. 1972. Economics of approval plans: proceedings. Westport, Conn: Greenwood Press.
Harvard
International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, Spyers-Duran P. and Gore D. (1972). Economics of approval plans: proceedings. Westport, Conn: Greenwood Press.
MLA
International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, International Seminar on Approval and Gathering Plans in Large and Medium Size Academic Libraries, Spyers-Duran Peter and Gore Daniel. Economics of approval plans: proceedings. Westport, Conn: Greenwood Press. 1972.