एपीए उद्धरण

Dahlberg, I. (1978). Ontical structures and universal classification. Sarada Ranganathan Endowment.

शिकागो स्टाइल उद्धरण

Dahlberg, Ingetraut. Ontical Structures and Universal Classification. Bangalore: Sarada Ranganathan Endowment, 1978.

एमएलए उद्धरण

Dahlberg, Ingetraut. Ontical Structures and Universal Classification. Sarada Ranganathan Endowment, 1978.