Warning: session_start(): open(/var/cpanel/php/sessions/alt-php81/sess_snj7vdj0ronf196pd9fg3mpa2a, O_RDWR) failed: No such file or directory (2) in /home/ftunma/public_html/e-library/lib/Session/Factory.php on line 59

Warning: session_start(): Failed to read session data: files (path: /var/cpanel/php/sessions/alt-php81) in /home/ftunma/public_html/e-library/lib/Session/Factory.php on line 59

Gaya APA

Ridley, J. (2008). Ikhtisar Kesehatan dan Keselamatan Kerja Edisi Ketiga . Jakarta: Jakarta: Erlangga.

Gaya MLA

Ridley, John. "Ikhtisar Kesehatan dan Keselamatan Kerja Edisi Ketiga". Jakarta: Jakarta: Erlangga, 2008. Text.