Gaya APA

Associates, J, K, &. (2014). 1910 OSHA guide: workplace safety regulations & index . Canada: J.J. Keller.

Gaya MLA

Associates, J.J., Keller, &. "1910 OSHA guide: workplace safety regulations & index". Canada: J.J. Keller, 2014. eBook Kesehatan Masyarakat.