APA aipamena

Vallen, G. K., & Vallen, J. J. (2000). Check-in check-out (6th ed.). Upper Saddle River, NJ: Prentice Hall.

Chicago Style aipamena

Vallen, Gary K., và Jerome J. Vallen. Check-in Check-out. 6th ed. Upper Saddle River, NJ: Prentice Hall, 2000.

MLA aipamena

Vallen, Gary K., và Jerome J. Vallen. Check-in Check-out. 6th ed. Upper Saddle River, NJ: Prentice Hall, 2000.

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