APA
Cambodia Development Resource institute (CDRI), . (1999). English teachers' resource manual. Phnom Penh: .
Chicago
Cambodia Development Resource institute (CDRI), . 1999. English teachers' resource manual. Phnom Penh: .
Harvard
Cambodia Development Resource institute (CDRI), . (1999). English teachers' resource manual. Phnom Penh: .
MLA
Cambodia Development Resource institute (CDRI), . English teachers' resource manual. Phnom Penh: . 1999.
