The secret of self-improvement

 Fitriani, Okina; Puteri, Melati M.; Setiawaty, Elly; Susanti, Susi A.; Amirul, Ninik; Soneta, Mira; Sugiri, Azizah; Karina; Aryjati, Sitaresmi Sylvi; Kurniah, Yuni; Lasmita, Ilmia; sari, Pandhora; Wilkinson, Novi Nursanti;

Jakarta : Gramedia Pustaka Utama , 2014