एपीए उद्धरण

Hiland, R. E., & Richardson, W. J. (1957). Work sampling. mc Graw Hill Book company.

शिकागो स्टाइल उद्धरण

Hiland, Robert E., और Wallance J. Richardson. Work Sampling. New york: mc Graw Hill Book company, 1957.

एमएलए उद्धरण

Hiland, Robert E., और Wallance J. Richardson. Work Sampling. mc Graw Hill Book company, 1957.