Παραπομπή APA

Ranganathan, S. R. (1967). Prolegomena to library classification (23.).

Παραπομπή Chicago Style

Ranganathan, S R. Prolegomena to Library Classification. 23. Asia Publishing House, Bombay, 1967.

Παραπομπή MLA

Ranganathan, S R. Prolegomena to Library Classification. 23. 1967.