Gaya APA

SMITH, R, E. (2015). ELECTRICITY FOR REFRIGERATION, HEATING, AND AIR CONDITIONING 9TH EDITION (9TH EDITION). United States of America: CENGAGE LEARNING.

Gaya MLA

SMITH, RUSSELL, E. "ELECTRICITY FOR REFRIGERATION, HEATING, AND AIR CONDITIONING 9TH EDITION". 9TH EDITION United States of America: CENGAGE LEARNING, 2015. Text.