APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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