Gaya APA
Chaffey, D. et al (2019).
Digital business and e-commerce management (7th.ed.).
Harlow, England:
Pearson Education.
Gaya MLA
Chaffey, Dave. et al.
"Digital business and e-commerce management".
7th.ed.
Harlow, England:
Pearson Education,
2019.
Teks.