APA

(1949). Les services bibliographiques. Washington, D. C: [s.n.].

Chicago

1949. Les services bibliographiques. Washington, D. C: [s.n.].

Harvard

(1949). Les services bibliographiques. Washington, D. C: [s.n.].

MLA

Les services bibliographiques. Washington, D. C: [s.n.]. 1949.