Gaya APA

Speegle, M. (2013). SAFETY, HEALTH, AND ENVIRONMENTAL CONCEPTS FOR THE PROCESS INDUSTRY (2nd). USA: SOUTH-WESTERN CENGAGE LEARNING.

Gaya MLA

Speegle, Michael. "SAFETY, HEALTH, AND ENVIRONMENTAL CONCEPTS FOR THE PROCESS INDUSTRY". 2nd USA: SOUTH-WESTERN CENGAGE LEARNING, 2013. Text.