APA-viite (7. p.)
Gumba, G. D. (2013). Effect of credit card challenges on the performance of Barclaycard Kenya. Daystar University.
Chicago-viite (17. p.)
Gumba, Gail Dolsi. Effect of Credit Card Challenges on the Performance of Barclaycard Kenya. Nairobi, Kenya: Daystar University, 2013.
MLA-viite (9. p.)
Gumba, Gail Dolsi. Effect of Credit Card Challenges on the Performance of Barclaycard Kenya. Daystar University, 2013.
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