Gaya APA

Northup, . et al (2002). Engineering Fundamentals & Problem Solving (Ed. 4). Amerika Serikat: Mcgraw-Hill Book Company, INC..

Gaya MLA

Northup, . et al. "Engineering Fundamentals & Problem Solving". Ed. 4 Amerika Serikat: Mcgraw-Hill Book Company, INC., 2002. Text.