Abstracting services.

MLA

International Federation for Documentation. Abstracting services. [Second edition]. The Hague, [publisher not identified], 1969.

APA

International Federation for Documentation. (1969). Abstracting services. [Second edition]. The Hague, [publisher not identified].

Chicago

International Federation for Documentation. Abstracting services. [Second edition]. The Hague, [publisher not identified], 1969.