एपीए उद्धरण

Holm, R. Electric contacts: :theory and application.

शिकागो स्टाइल उद्धरण

Holm, Ragnar. Electric Contacts: :theory and Application. New York Springer - Verlag 1967.

एमएलए उद्धरण

Holm, Ragnar. Electric Contacts: :theory and Application.