Gaya APA
Guffey, Mary Ellen, & Loewy, Dana. (2015).
Essentials of Business Communication, 9th edition .
America:
Cengage Learning.
Gaya Chicago
Guffey, Mary Ellen, & Loewy, Dana.
Essentials of Business Communication, 9th edition.
America:
Cengage Learning,
2015.
Electronic sources.
Gaya MLA
Guffey, Mary Ellen, & Loewy, Dana.
Essentials of Business Communication, 9th edition.
America:
Cengage Learning,
2015.
Electronic sources.
Gaya Turabian
Guffey, Mary Ellen, & Loewy, Dana.
Essentials of Business Communication, 9th edition.
America:
Cengage Learning,
2015.
Electronic sources.