ZK™

MLA

Chen, Henri, et al. Zk™. Apress, 2007.

APA

Chen, H., Cheng, R., Zammetti, F. W, & Cheng, A. (2007). ZK™. Apress.

Chicago

Chen, Henri, Robbie Cheng, Frank W Zammetti, and Amy Cheng. ZK™. : Apress, 2007.