Vallen, G. K., Vallen, J. J., & Robinson, G. F. (2008). Check-in check-out (2nd Canadian ed.). Pearson Education.
Chicago Style (17th ed.) CitationVallen, Gary K., Jerome J. Vallen, and Gary F. Robinson. Check-in Check-out. 2nd Canadian ed. Toronto, Ontario: Pearson Education, 2008.
MLA (9th ed.) CitationVallen, Gary K., et al. Check-in Check-out. 2nd Canadian ed. Pearson Education, 2008.
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