(2020). 销售与市场：营销版．2020,no.20-22,24.
Chicago Style aipamena销售与市场：营销版．2020,no.20-22,24. 2020.
MLA aipamena销售与市场：营销版．2020,no.20-22,24. 2020.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena
(2020). 销售与市场：营销版．2020,no.20-22,24.
Chicago Style aipamena销售与市场：营销版．2020,no.20-22,24. 2020.
MLA aipamena销售与市场：营销版．2020,no.20-22,24. 2020.