Duckworth, Angela, author
PT Gramedia Pustaka Utama, 2018
Buku Teks
Duckworth, Angela, author
Gramedia Pustaka Utama, 2018
Buku Teks
Debbie G. Retnoningsih, author
Fakultas Psikologi Universitas Indonesia, 1997
UI - Skripsi Membership
Mohammad Fauzy, author
1991
UI - Tesis (Membership)
Meutia Prima Dara, author
1998
UI - Skripsi (Membership)