एपीए उद्धरण

Hopkins, R. Handbook of industrial welfare. Sir Isaac pitman &sons limited.

शिकागो स्टाइल उद्धरण

Hopkins, R.R. Handbook of Industrial Welfare. London: Sir Isaac pitman &sons limited.

एमएलए उद्धरण

Hopkins, R.R. Handbook of Industrial Welfare. Sir Isaac pitman &sons limited.