Gaya APA

Dillman, D. et al (2014). Internet, Phone, Mail, And Mixed-Mode Surveys Fourth Edition (4). United States of America: John Wiley & Son, Inc.

Gaya MLA

Dillman, Don. et al. "Internet, Phone, Mail, And Mixed-Mode Surveys Fourth Edition". 4 United States of America: John Wiley & Son, Inc, 2014. Texts.