Gaya APA

Meade, ., Sonke, I, H, I. (1980). Workbook 3 effective english . London: London: Penguin Books; 1980.

Gaya MLA

Meade, ., Sonke, I., Haugh, II.. "Workbook 3 effective english". London: London: Penguin Books; 1980, 1980. Text.