Gaya APA

DuBrin, A, J. (2009). Human Relations Interpersonal Job-Oriented Skills (Tenth Edition). United State of America: Pearson Prentice Hall.

Gaya MLA

DuBrin, Andrew, J.. "Human Relations Interpersonal Job-Oriented Skills". Tenth Edition United State of America: Pearson Prentice Hall, 2009. Text.