Gaya APA

Luther, F., Nelson, Z. (2012). Orthodontics retainers and removable application; Principles of Design ans Use . : Blackwell Pubh.Inc.

Gaya MLA

Luther, Friedy., Nelson, Zararna. "Orthodontics retainers and removable application; Principles of Design ans Use". : Blackwell Pubh.Inc, 2012. Text.