Gaya APA

Goetsch, D, L. (2008). Occupational Safety And Health For Technologists, Engineers, And Managers (Sixth Edition). Amerika: Pearson Education, Inc..

Gaya MLA

Goetsch, David, L.. "Occupational Safety And Health For Technologists, Engineers, And Managers". Sixth Edition Amerika: Pearson Education, Inc., 2008. Text.